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TCP_FASTOPEN option for Socket #336

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TCP_FASTOPEN option for Socket #336

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85c2f2d
TCP_FASTOPEN option for Socket
zonyitoo Aug 24, 2022
ba56e62
TCP_FASTOPEN on Windows should be an u32
zonyitoo Aug 25, 2022
b481400
test for TCP_FASTOPEN
zonyitoo Aug 25, 2022
008a844
bind() before setting TCP_FASTOPEN
zonyitoo Aug 25, 2022
a9fa806
only Linux can set value > 1
zonyitoo Aug 25, 2022
d10aa55
force TCP_FASTOPEN value to be 0,1 excepts Linux
zonyitoo Aug 25, 2022
1a27707
Update src/socket.rs
zonyitoo Aug 25, 2022
345b754
Update tests/socket.rs
zonyitoo Aug 25, 2022
61e2803
enable tcp_fastopen on FreeBSD
zonyitoo Aug 25, 2022
2a2bf8e
ignore unused mut
zonyitoo Aug 26, 2022
71f7800
TCP_FASTOPEN getsockopt on Windows returns a 1-byte value
zonyitoo Aug 26, 2022
8cb823f
enable tcp_fastopen after build_script
zonyitoo Aug 26, 2022
b3a1b52
fixed FreeBSD CI and tests
zonyitoo Aug 28, 2022
7199cf6
FreeBSD sysctl removed sudo
zonyitoo Aug 28, 2022
9c448a4
Merge branch 'master' into master
zonyitoo Mar 26, 2025
31c7364
TCP_FASTOPEN on windows is c_int type
zonyitoo Mar 26, 2025
cf069e4
rustfmt
zonyitoo Mar 26, 2025
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12 changes: 8 additions & 4 deletions src/socket.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1466,7 +1466,7 @@ impl Socket {
///
/// <https://docs.microsoft.com/en-us/windows/win32/winsock/ipproto-tcp-socket-options>
///
/// `value` is a boolean with only `0` and `1`.
/// `value` is a boolean with only `0` and `1`. Any `value` > `1` will be set to `1`.
///
/// ## Linux
///
Expand All @@ -1481,15 +1481,15 @@ impl Socket {
///
/// ## macOS
///
/// `value` is a boolean with only `0` and `1`.
/// `value` is a boolean with only `0` and `1`. Any `value` > `1` will be set to `1`.
///
/// ## FreeBSD
///
/// FreeBSD supports TCP Fast Open since 12.0.
///
/// Example program: <https://people.freebsd.org/~pkelsey/tfo-tools/tfo-srv.c>
///
/// `value` is a boolean with only `0` and `1`.
/// `value` is a boolean with only `0` and `1`. Any `value` > `1` will be set to `1`.
#[cfg(any(
target_os = "linux",
target_os = "android",
Expand All @@ -1500,7 +1500,11 @@ impl Socket {
target_os = "tvos",
target_os = "windows"
))]
pub fn set_tcp_fastopen(&self, value: u32) -> io::Result<()> {
pub fn set_tcp_fastopen(&self, mut value: u32) -> io::Result<()> {
if !cfg!(any(target_os = "linux", target_os = "android")) && value > 1 {
value = 1;
}

unsafe {
setsockopt::<c_int>(
self.as_raw(),
Expand Down
5 changes: 3 additions & 2 deletions tests/socket.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1299,10 +1299,11 @@ fn tcp_fastopen() {
let bsaddr = SockAddr::from(baddr);
socket.bind(&bsaddr).unwrap();
socket.listen(128).unwrap();
socket.set_tcp_fastopen(5).unwrap();

if cfg!(any(target_os = "linux", target_os = "android")) {
socket.set_tcp_fastopen(5).unwrap();
assert_eq!(socket.tcp_fastopen().unwrap(), 5);
} else {
socket.set_tcp_fastopen(1).unwrap();
assert_eq!(socket.tcp_fastopen().unwrap(), 1);
}
}