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Fix connect timeout for VxWorks, read readiness of socket connection, Read readiness to detect errors. Fixes #127018 #127300

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Merged
merged 1 commit into from
Jul 25, 2024
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Fix connect timeout for VxWorks, read readiness of socket connection, Read readiness to detect errors. Fixes #127018 #127300

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In connect timeout, read readiness of socket for vxworks. Check pollh… 
…up or pollerr for refused connections in linux
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B I Mohammed Abbas committed Jul 25, 2024
commit 17b4fbc388ec11a3c1cdf7e33ff00a0322edaf98
29 changes: 19 additions & 10 deletions library/std/src/sys/pal/unix/net.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -213,16 +213,25 @@ impl Socket {
}
0 => {}
_ => {
// linux returns POLLOUT|POLLERR|POLLHUP for refused connections (!), so look
// for POLLHUP rather than read readiness
if pollfd.revents & libc::POLLHUP != 0 {
let e = self.take_error()?.unwrap_or_else(|| {
io::const_io_error!(
io::ErrorKind::Uncategorized,
"no error set after POLLHUP",
)
});
return Err(e);
if cfg!(target_os = "vxworks") {
// VxWorks poll does not return POLLHUP or POLLERR in revents. Check if the
// connnection actually succeeded and return ok only when the socket is
// ready and no errors were found.
if let Some(e) = self.take_error()? {
return Err(e);
}
} else {
// linux returns POLLOUT|POLLERR|POLLHUP for refused connections (!), so look
// for POLLHUP or POLLERR rather than read readiness
if pollfd.revents & (libc::POLLHUP | libc::POLLERR) != 0 {
let e = self.take_error()?.unwrap_or_else(|| {
io::const_io_error!(
io::ErrorKind::Uncategorized,
"no error set after POLLHUP",
)
});
return Err(e);
}
}

return Ok(());
Expand Down