Function recvoob

timestamp/timestamp_linux.go:252–263

recvoob receives only OOB message from the socket This is used for TX timestamp read of MSG_ERRQUEUE where we couldn't care less about other data. This is partially based on Recvmsg https://github.com/golang/go/blob/2ebe77a2fda1ee9ff6fd9a3e08933ad1ebaea039/src/syscall/syscall_linux.go#L647

(connFd int, oob []byte)

		n, err := poll(fds, &timeout, nil)
		if errors.Is(err, syscall.EINTR) {
			continue
		}
		if err != nil {
			return err
		}
		if n == 0 {
			return syscall.ETIMEDOUT
		}
		return nil
	}
}

// recvoob receives only OOB message from the socket
// This is used for TX timestamp read of MSG_ERRQUEUE where we couldn't care less about other data.
// This is partially based on Recvmsg