RustPython/crates/stdlib/src/overlapped.rs at 0.6.0 · RustPython/RustPython · GitHub

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// spell-checker:disable

pub(crate) use _overlapped::module_def;

#[allow(non_snake_case)]

#[pymodule]

mod _overlapped {

// straight-forward port of Modules/overlapped.c

use crate::vm::{

AsObject, Py, PyObjectRef, PyPayload, PyResult, VirtualMachine,

builtins::{

PyBaseExceptionRef, PyBytesRef, PyModule, PyStrRef, PyTuple, PyTupleRef, PyType,

common::lock::PyMutex,

convert::{ToPyException, ToPyObject},

function::{ArgBytesLike, ArgMemoryBuffer, OptionalArg},

object::{Traverse, TraverseFn},

protocol::PyBuffer,

types::{Constructor, Destructor},

};

use rustpython_host_env::{

overlapped as host_overlapped, winapi as host_winapi, windows as host_windows,

windows::ToWideString,

};

pub(crate) fn module_exec(vm: &VirtualMachine, module: &Py<PyModule>) -> PyResult<()> {

let _ = vm.import("_socket", 0)?;

host_overlapped::initialize_winsock_extensions()

.map_err(|err| set_from_windows_err(err.raw_os_error().unwrap_or(0) as u32, vm))?;

__module_exec(vm, module);

Ok(())

}

#[pyattr]

const ERROR_IO_PENDING: u32 = host_winapi::ERROR_IO_PENDING;

#[pyattr]

const ERROR_NETNAME_DELETED: u32 = host_winapi::ERROR_NETNAME_DELETED;

#[pyattr]

const ERROR_OPERATION_ABORTED: u32 = host_winapi::ERROR_OPERATION_ABORTED;

#[pyattr]

const ERROR_PIPE_BUSY: u32 = host_winapi::ERROR_PIPE_BUSY;

#[pyattr]

const ERROR_PORT_UNREACHABLE: u32 = host_winapi::ERROR_PORT_UNREACHABLE;

#[pyattr]

const ERROR_SEM_TIMEOUT: u32 = host_winapi::ERROR_SEM_TIMEOUT;

#[pyattr]

const SO_UPDATE_ACCEPT_CONTEXT: i32 = host_overlapped::SO_UPDATE_ACCEPT_CONTEXT_VALUE;

#[pyattr]

const SO_UPDATE_CONNECT_CONTEXT: i32 = host_overlapped::SO_UPDATE_CONNECT_CONTEXT_VALUE;

#[pyattr]

const TF_REUSE_SOCKET: u32 = host_overlapped::TF_REUSE_SOCKET_FLAG;

#[pyattr]

const INFINITE: u32 = host_winapi::INFINITE_TIMEOUT;

#[pyattr]

const INVALID_HANDLE_VALUE: isize = host_overlapped::INVALID_HANDLE_VALUE_ISIZE;

#[pyattr]

const NULL: isize = 0;

#[pyattr]

#[pyclass(name, traverse)]

#[derive(PyPayload)]

struct Overlapped {

inner: PyMutex<OverlappedInner>,

}

struct OverlappedInner {

overlapped: host_overlapped::OverlappedIo,

handle: host_overlapped::Handle,

error: u32,

data: OverlappedData,

}

unsafe impl Sync for OverlappedInner {}

unsafe impl Send for OverlappedInner {}

unsafe impl Traverse for OverlappedInner {

fn traverse(&self, traverse_fn: &mut TraverseFn<'_>) {

match &self.data {

OverlappedData::Read(buf) | OverlappedData::Accept(buf) => {

buf.traverse(traverse_fn);

}

OverlappedData::ReadInto(buf) | OverlappedData::Write(buf) => {

buf.traverse(traverse_fn);

}

OverlappedData::WriteTo(wt) => {

wt.buf.traverse(traverse_fn);

}

OverlappedData::ReadFrom(rf) => {

if let Some(result) = &rf.result {

result.traverse(traverse_fn);

}

rf.allocated_buffer.traverse(traverse_fn);

}

OverlappedData::ReadFromInto(rfi) => {

if let Some(result) = &rfi.result {

result.traverse(traverse_fn);

}

rfi.user_buffer.traverse(traverse_fn);

}

_ => {}

}

impl core::fmt::Debug for Overlapped {

fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {

let zelf = self.inner.lock();

f.debug_struct("Overlapped")

.field("handle", &zelf.handle)

.field("error", &zelf.error)

.field("data", &zelf.data)

.finish()

}

#[derive(Debug)]

enum OverlappedData {

None,

NotStarted,

Read(PyBytesRef),

// Fields below store buffers that must be kept alive during async operations

#[allow(dead_code)]

ReadInto(PyBuffer),

#[allow(dead_code)]

Write(PyBuffer),

#[allow(dead_code)]

Accept(PyBytesRef),

Connect(Vec<u8>), // Store address bytes to keep them alive during async operation

Disconnect,

ConnectNamedPipe,

#[allow(dead_code)] // Reserved for named pipe support

WaitNamedPipeAndConnect,

TransmitFile,

ReadFrom(OverlappedReadFrom),

WriteTo(OverlappedWriteTo), // Store address bytes for WSASendTo

ReadFromInto(OverlappedReadFromInto),

}

struct OverlappedReadFrom {

// A (buffer, (host, port)) tuple

result: Option<PyObjectRef>,

// The actual read buffer

allocated_buffer: PyBytesRef,

address: host_overlapped::SocketAddrV6,

address_length: i32,

}

impl core::fmt::Debug for OverlappedReadFrom {

fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {

f.debug_struct("OverlappedReadFrom")

.field("result", &self.result)

.field("allocated_buffer", &self.allocated_buffer)

.field("address_length", &self.address_length)

.finish()

}

struct OverlappedReadFromInto {

// A (number of bytes read, (host, port)) tuple

result: Option<PyObjectRef>,

/* Buffer passed by the user */

user_buffer: PyBuffer,

address: host_overlapped::SocketAddrV6,

address_length: i32,

}

impl core::fmt::Debug for OverlappedReadFromInto {

fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {

f.debug_struct("OverlappedReadFromInto")

.field("result", &self.result)

.field("user_buffer", &self.user_buffer)

.field("address_length", &self.address_length)

.finish()

}

struct OverlappedWriteTo {

buf: PyBuffer,

address: Vec<u8>, // Keep address alive during async operation

}

impl core::fmt::Debug for OverlappedWriteTo {

fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {

f.debug_struct("OverlappedWriteTo")

.field("buf", &self.buf)

.field("address", &self.address.len())

.finish()

}

fn set_from_windows_err(err: u32, vm: &VirtualMachine) -> PyBaseExceptionRef {

let err = if err == 0 {

host_winapi::get_last_error()

} else {

err

};

let errno = rustpython_host_env::os::winerror_to_errno(err as i32);

let message = std::io::Error::from_raw_os_error(err as i32).to_string();

let exc = vm.new_errno_error(errno, message);

let _ = exc

.as_object()

.set_attr("winerror", err.to_pyobject(vm), vm);

exc.upcast()

}

/// Parse a Python address tuple to SOCKADDR

fn parse_address(addr_obj: &Py<PyTuple>, vm: &VirtualMachine) -> PyResult<(Vec<u8>, i32)> {

match addr_obj.as_slice().len() {

2 => {

// IPv4: (host, port)

let host: PyStrRef = addr_obj.as_slice()[0].clone().try_into_value(vm)?;

let port: u16 = addr_obj.as_slice()[1].clone().try_to_value(vm)?;

let host_wide = host

.as_wtf8()

.to_wide_cstring()

.map_err(|e| e.to_pyexception(vm))?;

host_overlapped::parse_address_v4_wide(&host_wide, port)

.map_err(|err| set_from_windows_err(err.raw_os_error().unwrap_or(0) as u32, vm))

}

4 => {

// IPv6: (host, port, flowinfo, scope_id)

let host: PyStrRef = addr_obj.as_slice()[0].clone().try_into_value(vm)?;

let port: u16 = addr_obj.as_slice()[1].clone().try_to_value(vm)?;

let flowinfo: u32 = addr_obj.as_slice()[2].clone().try_to_value(vm)?;

let scope_id: u32 = addr_obj.as_slice()[3].clone().try_to_value(vm)?;

let host_wide = host

.as_wtf8()

.to_wide_cstring()

.map_err(|e| e.to_pyexception(vm))?;

host_overlapped::parse_address_v6_wide(&host_wide, port, flowinfo, scope_id)

.map_err(|err| set_from_windows_err(err.raw_os_error().unwrap_or(0) as u32, vm))

}

_ => Err(vm.new_value_error("illegal address_as_bytes argument")),

}

/// Parse a SOCKADDR_IN6 (which can also hold IPv4 addresses) to a Python address tuple

fn unparse_address(

addr: &host_overlapped::SocketAddrV6,

addr_len: i32,

vm: &VirtualMachine,

) -> PyResult {

match host_overlapped::unparse_address(

addr as *const _ as *const host_overlapped::SocketAddrRaw,

addr_len,

)

.map_err(|_| vm.new_value_error("recvfrom returned unsupported address family"))?

{

host_overlapped::SocketAddress::V4 { host, port } => Ok((host, port).to_pyobject(vm)),

host_overlapped::SocketAddress::V6 {

host,

port,

flowinfo,

scope_id,

} => Ok((host, port, flowinfo, scope_id).to_pyobject(vm)),

}

#[pyclass(with(Constructor, Destructor))]

impl Overlapped {

#[pygetset]

fn address(zelf: &Py<Self>, _vm: &VirtualMachine) -> usize {

let inner = zelf.inner.lock();

&inner.overlapped as *const _ as usize

}

#[pygetset]

fn pending(zelf: &Py<Self>, _vm: &VirtualMachine) -> bool {

let inner = zelf.inner.lock();

!host_overlapped::has_overlapped_io_completed(&inner.overlapped)

&& !matches!(inner.data, OverlappedData::NotStarted)

}

#[pygetset]

fn error(zelf: &Py<Self>, _vm: &VirtualMachine) -> u32 {

let inner = zelf.inner.lock();

inner.error

}

#[pygetset]

fn event(zelf: &Py<Self>, _vm: &VirtualMachine) -> isize {

let inner = zelf.inner.lock();

inner.overlapped.hEvent as isize

}

#[pymethod]

fn cancel(zelf: &Py<Self>, vm: &VirtualMachine) -> PyResult<()> {

let inner = zelf.inner.lock();

if matches!(

inner.data,

OverlappedData::NotStarted | OverlappedData::WaitNamedPipeAndConnect

) {

return Ok(());

}

if !host_overlapped::has_overlapped_io_completed(&inner.overlapped) {

host_overlapped::cancel_overlapped(inner.handle, &inner.overlapped).map_err(

|err| set_from_windows_err(err.raw_os_error().unwrap_or(0) as u32, vm),

)?;

}

Ok(())

}

#[pymethod]

fn getresult(zelf: &Py<Self>, wait: OptionalArg<bool>, vm: &VirtualMachine) -> PyResult {

use host_winapi::{ERROR_BROKEN_PIPE, ERROR_MORE_DATA, ERROR_SUCCESS};

let mut inner = zelf.inner.lock();

let wait = wait.unwrap_or(false);

// Check operation state

if matches!(inner.data, OverlappedData::None) {

return Err(vm.new_value_error("operation not yet attempted"));

}

if matches!(inner.data, OverlappedData::NotStarted) {

return Err(vm.new_value_error("operation failed to start"));

}

let result = vm.allow_threads(|| {

host_overlapped::get_overlapped_result(inner.handle, &inner.overlapped, wait)

});

let transferred = result.transferred;

let err = result.error;

inner.error = err;

// Handle errors

match err {

ERROR_SUCCESS | ERROR_MORE_DATA => {}

ERROR_BROKEN_PIPE => {

let allow_broken_pipe = match &inner.data {

OverlappedData::Read(_) | OverlappedData::ReadInto(_) => true,

OverlappedData::ReadFrom(_) => true,

OverlappedData::ReadFromInto(rfi) => rfi.result.is_some(),

_ => false,

};

if !allow_broken_pipe {

return Err(set_from_windows_err(err, vm));

}

_ => return Err(set_from_windows_err(err, vm)),

}

// Return result based on operation type

match &mut inner.data {

OverlappedData::Read(buf) => {

let len = buf.as_bytes().len();

let result = if transferred as usize != len {

let resized = vm

.ctx

.new_bytes(buf.as_bytes()[..transferred as usize].to_vec());

*buf = resized.clone();

resized

} else {

buf.clone()

};

Ok(result.into())

}

OverlappedData::ReadFrom(rf) => {

let len = rf.allocated_buffer.as_bytes().len();

let resized_buf = if transferred as usize != len {

let resized = vm.ctx.new_bytes(

rf.allocated_buffer.as_bytes()[..transferred as usize].to_vec(),

);

rf.allocated_buffer = resized.clone();

resized

} else {

rf.allocated_buffer.clone()

};

let addr_tuple = unparse_address(&rf.address, rf.address_length, vm)?;

if let Some(result) = &rf.result {

return Ok(result.clone());

}

let result = vm.ctx.new_tuple(vec![resized_buf.into(), addr_tuple]);

rf.result = Some(result.clone().into());

Ok(result.into())

}

OverlappedData::ReadFromInto(rfi) => {

let addr_tuple = unparse_address(&rfi.address, rfi.address_length, vm)?;

if let Some(result) = &rfi.result {

return Ok(result.clone());

}

let result = vm

.ctx

.new_tuple(vec![vm.ctx.new_int(transferred).into(), addr_tuple]);

rfi.result = Some(result.clone().into());

Ok(result.into())

}

_ => Ok(vm.ctx.new_int(transferred).into()),

}

// ReadFile

#[pymethod]

fn ReadFile(zelf: &Py<Self>, handle: isize, size: u32, vm: &VirtualMachine) -> PyResult {

use host_winapi::{

ERROR_BROKEN_PIPE, ERROR_IO_PENDING, ERROR_MORE_DATA, ERROR_SUCCESS,

};

let mut inner = zelf.inner.lock();

if !matches!(inner.data, OverlappedData::None) {

return Err(vm.new_value_error("operation already attempted"));

}

#[cfg(target_pointer_width = "32")]

let size = core::cmp::min(size, isize::MAX as u32);

let buf = vec![0u8; core::cmp::max(size, 1) as usize];

let buf = vm.ctx.new_bytes(buf);

inner.handle = handle as host_overlapped::Handle;

inner.data = OverlappedData::Read(buf.clone());

let err = host_overlapped::start_read_file(

handle as host_overlapped::Handle,

buf.as_bytes().as_ptr() as *mut u8,

size,

&mut inner.overlapped,

);

inner.error = err;

match err {

ERROR_BROKEN_PIPE => {

host_overlapped::mark_as_completed(&mut inner.overlapped);

Err(set_from_windows_err(err, vm))

}

ERROR_SUCCESS | ERROR_MORE_DATA | ERROR_IO_PENDING => Ok(vm.ctx.none()),

_ => {

inner.data = OverlappedData::NotStarted;

Err(set_from_windows_err(err, vm))

}

// ReadFileInto

#[pymethod]

fn ReadFileInto(

zelf: &Py<Self>,

handle: isize,

// w*, as _overlapped.Overlapped.ReadFileInto takes

buf: ArgMemoryBuffer,

vm: &VirtualMachine,

) -> PyResult {

use host_winapi::{

ERROR_BROKEN_PIPE, ERROR_IO_PENDING, ERROR_MORE_DATA, ERROR_SUCCESS,

};

let buf: PyBuffer = buf.into();

let mut inner = zelf.inner.lock();

if !matches!(inner.data, OverlappedData::None) {

return Err(vm.new_value_error("operation already attempted"));

}

inner.handle = handle as host_overlapped::Handle;

let buf_len = buf.desc.len;

if buf_len > u32::MAX as usize {

return Err(vm.new_value_error("buffer too large"));

}

// For async read, buffer must be contiguous - we can't use a temporary copy

// because Windows writes data directly to the buffer after this call returns

let Some(mut contiguous) = buf.as_contiguous_mut() else {

return Err(vm.new_buffer_error("buffer is not contiguous"));

};

inner.data = OverlappedData::ReadInto(buf.clone());

let err = host_overlapped::start_read_file(

handle as host_overlapped::Handle,

contiguous.as_mut_ptr(),

buf_len as u32,

&mut inner.overlapped,

);

inner.error = err;

match err {

ERROR_BROKEN_PIPE => {

host_overlapped::mark_as_completed(&mut inner.overlapped);

Err(set_from_windows_err(err, vm))

}

ERROR_SUCCESS | ERROR_MORE_DATA | ERROR_IO_PENDING => Ok(vm.ctx.none()),

_ => {

inner.data = OverlappedData::NotStarted;

Err(set_from_windows_err(err, vm))

}

// WSARecv

#[pymethod]

fn WSARecv(

zelf: &Py<Self>,

handle: isize,

size: u32,

flags: OptionalArg<u32>,

vm: &VirtualMachine,

) -> PyResult {

use host_winapi::{

ERROR_BROKEN_PIPE, ERROR_IO_PENDING, ERROR_MORE_DATA, ERROR_SUCCESS,

};

let mut inner = zelf.inner.lock();

if !matches!(inner.data, OverlappedData::None) {

return Err(vm.new_value_error("operation already attempted"));

}

let mut flags = flags.unwrap_or(0);

#[cfg(target_pointer_width = "32")]

let size = core::cmp::min(size, isize::MAX as u32);

let buf = vec![0u8; core::cmp::max(size, 1) as usize];

let buf = vm.ctx.new_bytes(buf);

inner.handle = handle as host_overlapped::Handle;

inner.data = OverlappedData::Read(buf.clone());

let err = host_overlapped::start_wsa_recv(

handle as usize,

buf.as_bytes().as_ptr() as *mut u8,

size,

&mut flags,

&mut inner.overlapped,

);

inner.error = err;

match err {

ERROR_BROKEN_PIPE => {

host_overlapped::mark_as_completed(&mut inner.overlapped);

Err(set_from_windows_err(err, vm))

}

ERROR_SUCCESS | ERROR_MORE_DATA | ERROR_IO_PENDING => Ok(vm.ctx.none()),

_ => {

inner.data = OverlappedData::NotStarted;

Err(set_from_windows_err(err, vm))

}

// WSARecvInto

#[pymethod]

fn WSARecvInto(

zelf: &Py<Self>,

handle: isize,

// w*, as _overlapped.Overlapped.WSARecvInto takes

buf: ArgMemoryBuffer,

flags: u32,

vm: &VirtualMachine,

) -> PyResult {

use host_winapi::{

ERROR_BROKEN_PIPE, ERROR_IO_PENDING, ERROR_MORE_DATA, ERROR_SUCCESS,

};

let buf: PyBuffer = buf.into();

let mut inner = zelf.inner.lock();

if !matches!(inner.data, OverlappedData::None) {

return Err(vm.new_value_error("operation already attempted"));

}

let mut flags = flags;

inner.handle = handle as host_overlapped::Handle;

let buf_len = buf.desc.len;

if buf_len > u32::MAX as usize {

return Err(vm.new_value_error("buffer too large"));

}

let Some(mut contiguous) = buf.as_contiguous_mut() else {

return Err(vm.new_buffer_error("buffer is not contiguous"));

};

inner.data = OverlappedData::ReadInto(buf.clone());

let err = host_overlapped::start_wsa_recv(

handle as usize,

contiguous.as_mut_ptr(),

buf_len as u32,

&mut flags,

&mut inner.overlapped,

);

inner.error = err;

match err {

ERROR_BROKEN_PIPE => {

host_overlapped::mark_as_completed(&mut inner.overlapped);

Err(set_from_windows_err(err, vm))

}

ERROR_SUCCESS | ERROR_MORE_DATA | ERROR_IO_PENDING => Ok(vm.ctx.none()),

_ => {

inner.data = OverlappedData::NotStarted;

Err(set_from_windows_err(err, vm))

}

// WriteFile

#[pymethod]

fn WriteFile(

zelf: &Py<Self>,

handle: isize,

// y*, as _overlapped.Overlapped.WriteFile takes

buf: ArgBytesLike,

vm: &VirtualMachine,

) -> PyResult {

use host_winapi::{ERROR_IO_PENDING, ERROR_SUCCESS};

let buf: PyBuffer = buf.into();

let mut inner = zelf.inner.lock();

if !matches!(inner.data, OverlappedData::None) {

return Err(vm.new_value_error("operation already attempted"));

}

inner.handle = handle as host_overlapped::Handle;

let buf_len = buf.desc.len;

if buf_len > u32::MAX as usize {

return Err(vm.new_value_error("buffer too large"));

}

// For async write, buffer must be contiguous - we can't use a temporary copy

// because Windows reads from the buffer after this call returns

let Some(contiguous) = buf.as_contiguous() else {

return Err(vm.new_buffer_error("buffer is not contiguous"));

};

inner.data = OverlappedData::Write(buf.clone());

let err = host_overlapped::start_write_file(

handle as host_overlapped::Handle,

contiguous.as_ptr(),

buf_len as u32,

&mut inner.overlapped,

);

inner.error = err;

match err {

ERROR_SUCCESS | ERROR_IO_PENDING => Ok(vm.ctx.none()),

_ => {

inner.data = OverlappedData::NotStarted;

Err(set_from_windows_err(err, vm))

}

// WSASend

#[pymethod]

fn WSASend(

zelf: &Py<Self>,

handle: isize,

// y*, as _overlapped.Overlapped.WSASend takes

buf: ArgBytesLike,

flags: u32,

vm: &VirtualMachine,

) -> PyResult {

use host_winapi::{ERROR_IO_PENDING, ERROR_SUCCESS};

let buf: PyBuffer = buf.into();

let mut inner = zelf.inner.lock();

if !matches!(inner.data, OverlappedData::None) {

return Err(vm.new_value_error("operation already attempted"));

}

inner.handle = handle as host_overlapped::Handle;

let buf_len = buf.desc.len;

if buf_len > u32::MAX as usize {

return Err(vm.new_value_error("buffer too large"));

}

let Some(contiguous) = buf.as_contiguous() else {

return Err(vm.new_buffer_error("buffer is not contiguous"));

};

inner.data = OverlappedData::Write(buf.clone());

let err = host_overlapped::start_wsa_send(

handle as usize,

contiguous.as_ptr(),

buf_len as u32,

flags,

&mut inner.overlapped,

);

inner.error = err;

match err {

ERROR_SUCCESS | ERROR_IO_PENDING => Ok(vm.ctx.none()),

_ => {

inner.data = OverlappedData::NotStarted;

Err(set_from_windows_err(err, vm))

}

// AcceptEx

#[pymethod]

fn AcceptEx(

zelf: &Py<Self>,

listen_socket: isize,

accept_socket: isize,

vm: &VirtualMachine,

) -> PyResult {

use host_winapi::{ERROR_IO_PENDING, ERROR_SUCCESS};

let mut inner = zelf.inner.lock();

if !matches!(inner.data, OverlappedData::None) {

return Err(vm.new_value_error("operation already attempted"));

}

// Buffer size: local address + remote address

let size = core::mem::size_of::<host_overlapped::SocketAddrV6>() + 16;

let buf = vec![0u8; size * 2];

let buf = vm.ctx.new_bytes(buf);

inner.handle = listen_socket as host_overlapped::Handle;

inner.data = OverlappedData::Accept(buf.clone());

let err = host_overlapped::start_accept_ex(

listen_socket as usize,

accept_socket as usize,

buf.as_bytes().as_ptr() as *mut u8,

size as u32,

&mut inner.overlapped,

);

inner.error = err;

match err {

ERROR_SUCCESS | ERROR_IO_PENDING => Ok(vm.ctx.none()),

_ => {

inner.data = OverlappedData::NotStarted;

Err(set_from_windows_err(err, vm))

}

// ConnectEx

#[pymethod]

fn ConnectEx(

zelf: &Py<Self>,

socket: isize,

address: PyTupleRef,

vm: &VirtualMachine,

) -> PyResult {

use host_winapi::{ERROR_IO_PENDING, ERROR_SUCCESS};

let mut inner = zelf.inner.lock();

if !matches!(inner.data, OverlappedData::None) {

return Err(vm.new_value_error("operation already attempted"));

}

let (addr_bytes, addr_len) = parse_address(&address, vm)?;

inner.handle = socket as host_overlapped::Handle;

// Store addr_bytes in OverlappedData to keep it alive during async operation

inner.data = OverlappedData::Connect(addr_bytes);

// Get pointer to the stored address data

let addr_ptr = match &inner.data {

OverlappedData::Connect(bytes) => bytes.as_ptr(),

_ => unreachable!(),

};

let err = host_overlapped::start_connect_ex(

socket as usize,

addr_ptr as *const host_overlapped::SocketAddrRaw,

addr_len,

&mut inner.overlapped,

);

inner.error = err;

match err {

ERROR_SUCCESS | ERROR_IO_PENDING => Ok(vm.ctx.none()),

_ => {

inner.data = OverlappedData::NotStarted;

Err(set_from_windows_err(err, vm))

}

// DisconnectEx

#[pymethod]

fn DisconnectEx(

zelf: &Py<Self>,

socket: isize,

flags: u32,

vm: &VirtualMachine,

) -> PyResult {

use host_winapi::{ERROR_IO_PENDING, ERROR_SUCCESS};

let mut inner = zelf.inner.lock();

if !matches!(inner.data, OverlappedData::None) {

return Err(vm.new_value_error("operation already attempted"));

}

inner.handle = socket as host_overlapped::Handle;

inner.data = OverlappedData::Disconnect;

let err =

host_overlapped::start_disconnect_ex(socket as usize, flags, &mut inner.overlapped);

inner.error = err;

match err {

ERROR_SUCCESS | ERROR_IO_PENDING => Ok(vm.ctx.none()),

_ => {

inner.data = OverlappedData::NotStarted;

Err(set_from_windows_err(err, vm))

}

// TransmitFile

#[allow(

clippy::too_many_arguments,

reason = "mirrors Windows TransmitFile argument structure"

)]

#[pymethod]

fn TransmitFile(

zelf: &Py<Self>,

socket: isize,

file: isize,

offset: u32,

offset_high: u32,

count_to_write: u32,

count_per_send: u32,

flags: u32,

vm: &VirtualMachine,

) -> PyResult {

use host_winapi::{ERROR_IO_PENDING, ERROR_SUCCESS};

let mut inner = zelf.inner.lock();

if !matches!(inner.data, OverlappedData::None) {

return Err(vm.new_value_error("operation already attempted"));

}

inner.handle = socket as host_overlapped::Handle;

inner.data = OverlappedData::TransmitFile;

let err = host_overlapped::start_transmit_file(

socket as usize,

file as host_overlapped::Handle,

count_to_write,

count_per_send,

flags,

offset,

offset_high,

&mut inner.overlapped,

);

inner.error = err;

match err {

ERROR_SUCCESS | ERROR_IO_PENDING => Ok(vm.ctx.none()),

_ => {

inner.data = OverlappedData::NotStarted;

Err(set_from_windows_err(err, vm))

}

// ConnectNamedPipe

#[pymethod]

fn ConnectNamedPipe(zelf: &Py<Self>, pipe: isize, vm: &VirtualMachine) -> PyResult<bool> {

use host_winapi::{ERROR_IO_PENDING, ERROR_PIPE_CONNECTED, ERROR_SUCCESS};

let mut inner = zelf.inner.lock();

if !matches!(inner.data, OverlappedData::None) {

return Err(vm.new_value_error("operation already attempted"));

}

inner.handle = pipe as host_overlapped::Handle;

inner.data = OverlappedData::ConnectNamedPipe;

let err = host_overlapped::start_connect_named_pipe(

pipe as host_overlapped::Handle,

&mut inner.overlapped,

);

inner.error = err;

match err {

ERROR_PIPE_CONNECTED => {

host_overlapped::mark_as_completed(&mut inner.overlapped);

Ok(true)

}

ERROR_SUCCESS | ERROR_IO_PENDING => Ok(false),

_ => {

inner.data = OverlappedData::NotStarted;

Err(set_from_windows_err(err, vm))

}

// WSASendTo

#[pymethod]

fn WSASendTo(

zelf: &Py<Self>,

handle: isize,

// y*, as _overlapped.Overlapped.WSASendTo takes

buf: ArgBytesLike,

flags: u32,

address: PyTupleRef,

vm: &VirtualMachine,

) -> PyResult {

use host_winapi::{ERROR_IO_PENDING, ERROR_SUCCESS};

let buf: PyBuffer = buf.into();

let mut inner = zelf.inner.lock();

if !matches!(inner.data, OverlappedData::None) {

return Err(vm.new_value_error("operation already attempted"));

}

let (addr_bytes, addr_len) = parse_address(&address, vm)?;

inner.handle = handle as host_overlapped::Handle;

let buf_len = buf.desc.len;

if buf_len > u32::MAX as usize {

return Err(vm.new_value_error("buffer too large"));

}

let Some(contiguous) = buf.as_contiguous() else {

return Err(vm.new_buffer_error("buffer is not contiguous"));

};

// Store both buffer and address in OverlappedData to keep them alive

inner.data = OverlappedData::WriteTo(OverlappedWriteTo {

buf: buf.clone(),

address: addr_bytes,

});

// Get pointer to the stored address data

let addr_ptr = match &inner.data {

OverlappedData::WriteTo(wt) => wt.address.as_ptr(),

_ => unreachable!(),

};

let err = host_overlapped::start_wsa_send_to(

handle as usize,

contiguous.as_ptr(),

buf_len as u32,

flags,

addr_ptr as *const host_overlapped::SocketAddrRaw,

addr_len,

&mut inner.overlapped,

);

inner.error = err;

match err {

ERROR_SUCCESS | ERROR_IO_PENDING => Ok(vm.ctx.none()),

_ => {

inner.data = OverlappedData::NotStarted;

Err(set_from_windows_err(err, vm))

}

// WSARecvFrom

#[pymethod]

fn WSARecvFrom(

zelf: &Py<Self>,

handle: isize,

size: u32,

flags: OptionalArg<u32>,

vm: &VirtualMachine,

) -> PyResult {

use host_winapi::{

ERROR_BROKEN_PIPE, ERROR_IO_PENDING, ERROR_MORE_DATA, ERROR_SUCCESS,

};

let mut inner = zelf.inner.lock();

if !matches!(inner.data, OverlappedData::None) {

return Err(vm.new_value_error("operation already attempted"));

}

let mut flags = flags.unwrap_or(0);

#[cfg(target_pointer_width = "32")]

let size = core::cmp::min(size, isize::MAX as u32);

let buf = vec![0u8; core::cmp::max(size, 1) as usize];

let buf = vm.ctx.new_bytes(buf);

inner.handle = handle as host_overlapped::Handle;

let address: host_overlapped::SocketAddrV6 = unsafe { core::mem::zeroed() };

let address_length = core::mem::size_of::<host_overlapped::SocketAddrV6>() as i32;

inner.data = OverlappedData::ReadFrom(OverlappedReadFrom {

result: None,

allocated_buffer: buf.clone(),

address,

address_length,

});

// Get mutable reference to address in inner.data

let (addr_ptr, addr_len_ptr) = match &mut inner.data {

OverlappedData::ReadFrom(rf) => (

&mut rf.address as *mut host_overlapped::SocketAddrV6,

&mut rf.address_length as *mut i32,

_ => unreachable!(),

};

let err = host_overlapped::start_wsa_recv_from(

handle as usize,

buf.as_bytes().as_ptr() as *mut u8,

size,

&mut flags,

addr_ptr as *mut host_overlapped::SocketAddrRaw,

addr_len_ptr,

View remainder of file in raw view

RustPython/crates/stdlib/src/overlapped.rs at 0.6.0 · RustPython/RustPython · GitHub

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