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Copy pathsocket.rs
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1991 lines (1847 loc) · 64.2 KB
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use crate::common::lock::{PyMappedRwLockReadGuard, PyRwLock, PyRwLockReadGuard};
use crate::{
builtins::{int, PyStrRef, PyTupleRef, PyTypeRef},
byteslike::{ArgBytesLike, ArgMemoryBuffer},
exceptions::{IntoPyException, PyBaseExceptionRef},
function::{FuncArgs, OptionalArg, OptionalOption},
utils::{Either, ToCString},
IntoPyObject, PyClassImpl, PyObjectRef, PyResult, PyValue, TryFromBorrowedObject,
TryFromObject, TypeProtocol, VirtualMachine,
};
use crossbeam_utils::atomic::AtomicCell;
use gethostname::gethostname;
#[cfg(all(unix, not(target_os = "redox")))]
use nix::unistd::sethostname;
use num_traits::ToPrimitive;
use socket2::{Domain, Protocol, Socket, Type as SocketType};
use std::convert::TryFrom;
use std::mem::MaybeUninit;
use std::net::{self, Ipv4Addr, Ipv6Addr, Shutdown, SocketAddr, ToSocketAddrs};
use std::time::{Duration, Instant};
use std::{
ffi,
io::{self, Read, Write},
};
#[cfg(unix)]
type RawSocket = std::os::unix::io::RawFd;
#[cfg(windows)]
type RawSocket = std::os::windows::raw::SOCKET;
#[cfg(unix)]
macro_rules! errcode {
($e:ident) => {
c::$e
};
}
#[cfg(windows)]
macro_rules! errcode {
($e:ident) => {
paste::paste!(c::[<WSA $e>])
};
}
#[cfg(unix)]
use libc as c;
#[cfg(windows)]
mod c {
pub use winapi::shared::ifdef::IF_MAX_STRING_SIZE as IF_NAMESIZE;
pub use winapi::shared::netioapi::{if_indextoname, if_nametoindex};
pub use winapi::shared::ws2def::*;
pub use winapi::um::winsock2::{
SD_BOTH as SHUT_RDWR, SD_RECEIVE as SHUT_RD, SD_SEND as SHUT_WR, SOCK_DGRAM, SOCK_RAW,
SOCK_RDM, SOCK_SEQPACKET, SOCK_STREAM, SOL_SOCKET, SO_BROADCAST, SO_ERROR, SO_LINGER,
SO_OOBINLINE, SO_REUSEADDR, SO_TYPE, *,
};
}
#[cfg(windows)]
use winapi::shared::netioapi;
fn get_raw_sock(obj: PyObjectRef, vm: &VirtualMachine) -> PyResult<RawSocket> {
#[cfg(unix)]
type CastFrom = libc::c_long;
#[cfg(windows)]
type CastFrom = libc::c_longlong;
// should really just be to_index() but test_socket tests the error messages explicitly
if obj.isinstance(&vm.ctx.types.float_type) {
return Err(vm.new_type_error("integer argument expected, got float".to_owned()));
}
let int = vm
.to_index_opt(obj)
.unwrap_or_else(|| Err(vm.new_type_error("an integer is required".to_owned())))?;
int::try_to_primitive::<CastFrom>(int.as_bigint(), vm).map(|sock| sock as RawSocket)
}
#[cfg(unix)]
mod nullable_socket {
use super::*;
use std::os::unix::io::AsRawFd;
#[derive(Debug)]
#[repr(transparent)]
pub struct NullableSocket(Option<socket2::Socket>);
impl From<socket2::Socket> for NullableSocket {
fn from(sock: socket2::Socket) -> Self {
NullableSocket(Some(sock))
}
}
impl NullableSocket {
pub fn invalid() -> Self {
Self(None)
}
pub fn get(&self) -> Option<&socket2::Socket> {
self.0.as_ref()
}
pub fn fd(&self) -> RawSocket {
self.get().map_or(INVALID_SOCKET, |sock| sock.as_raw_fd())
}
pub fn insert(&mut self, sock: socket2::Socket) -> &mut socket2::Socket {
self.0.insert(sock)
}
}
}
#[cfg(windows)]
mod nullable_socket {
use super::*;
use std::os::windows::io::{AsRawSocket, FromRawSocket};
// TODO: may change if windows changes its TcpStream repr
#[derive(Debug)]
#[repr(transparent)]
pub struct NullableSocket(socket2::Socket);
impl From<socket2::Socket> for NullableSocket {
fn from(sock: socket2::Socket) -> Self {
NullableSocket(sock)
}
}
impl NullableSocket {
pub fn invalid() -> Self {
// TODO: may become UB in the future; maybe see rust-lang/rust#74699
Self(unsafe { socket2::Socket::from_raw_socket(INVALID_SOCKET) })
}
pub fn get(&self) -> Option<&socket2::Socket> {
(self.0.as_raw_socket() != INVALID_SOCKET).then(|| &self.0)
}
pub fn fd(&self) -> RawSocket {
self.0.as_raw_socket()
}
pub fn insert(&mut self, sock: socket2::Socket) -> &mut socket2::Socket {
self.0 = sock;
&mut self.0
}
}
}
use nullable_socket::NullableSocket;
impl Default for NullableSocket {
fn default() -> Self {
Self::invalid()
}
}
#[pyclass(module = "socket", name = "socket")]
#[derive(Debug, PyValue)]
pub struct PySocket {
kind: AtomicCell<i32>,
family: AtomicCell<i32>,
proto: AtomicCell<i32>,
pub(crate) timeout: AtomicCell<f64>,
sock: PyRwLock<NullableSocket>,
}
impl Default for PySocket {
fn default() -> Self {
PySocket {
kind: AtomicCell::default(),
family: AtomicCell::default(),
proto: AtomicCell::default(),
timeout: AtomicCell::new(-1.0),
sock: PyRwLock::new(NullableSocket::invalid()),
}
}
}
#[cfg(windows)]
const CLOSED_ERR: i32 = c::WSAENOTSOCK;
#[cfg(unix)]
const CLOSED_ERR: i32 = c::EBADF;
impl Read for &PySocket {
fn read(&mut self, buf: &mut [u8]) -> std::io::Result<usize> {
(&mut &*self.sock_io()?).read(buf)
}
}
impl Write for &PySocket {
fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
(&mut &*self.sock_io()?).write(buf)
}
fn flush(&mut self) -> std::io::Result<()> {
(&mut &*self.sock_io()?).flush()
}
}
impl PySocket {
pub fn sock_opt(&self) -> Option<PyMappedRwLockReadGuard<'_, Socket>> {
PyRwLockReadGuard::try_map(self.sock.read(), |sock| sock.get()).ok()
}
fn sock_io(&self) -> io::Result<PyMappedRwLockReadGuard<'_, Socket>> {
self.sock_opt()
.ok_or_else(|| io::Error::from_raw_os_error(CLOSED_ERR))
}
pub fn sock(&self, vm: &VirtualMachine) -> PyResult<PyMappedRwLockReadGuard<'_, Socket>> {
self.sock_io().map_err(|e| e.into_pyexception(vm))
}
fn init_inner(
&self,
family: i32,
socket_kind: i32,
proto: i32,
sock: Socket,
vm: &VirtualMachine,
) -> PyResult<()> {
self.family.store(family);
self.kind.store(socket_kind);
self.proto.store(proto);
let mut s = self.sock.write();
let sock = s.insert(sock);
let timeout = DEFAULT_TIMEOUT.load();
self.timeout.store(timeout);
if timeout >= 0.0 {
sock.set_nonblocking(true)
.map_err(|e| e.into_pyexception(vm))?;
}
Ok(())
}
#[inline]
fn sock_op<F, R>(&self, vm: &VirtualMachine, select: SelectKind, f: F) -> PyResult<R>
where
F: FnMut() -> io::Result<R>,
{
self.sock_op_err(vm, select, f)
.map_err(|e| e.into_pyexception(vm))
}
/// returns Err(blocking)
pub fn get_timeout(&self) -> Result<Duration, bool> {
let timeout = self.timeout.load();
if timeout > 0.0 {
Ok(Duration::from_secs_f64(timeout))
} else {
Err(timeout != 0.0)
}
}
fn sock_op_err<F, R>(
&self,
vm: &VirtualMachine,
select: SelectKind,
f: F,
) -> Result<R, IoOrPyException>
where
F: FnMut() -> io::Result<R>,
{
self.sock_op_timeout_err(vm, select, self.get_timeout().ok(), f)
}
fn sock_op_timeout_err<F, R>(
&self,
vm: &VirtualMachine,
select: SelectKind,
timeout: Option<Duration>,
mut f: F,
) -> Result<R, IoOrPyException>
where
F: FnMut() -> io::Result<R>,
{
let deadline = timeout.map(Deadline::new);
loop {
if deadline.is_some() || matches!(select, SelectKind::Connect) {
let interval = deadline.as_ref().map(|d| d.time_until()).transpose()?;
let res = sock_select(&*self.sock(vm)?, select, interval);
match res {
Ok(true) => return Err(IoOrPyException::Timeout),
Err(e) if e.kind() == io::ErrorKind::Interrupted => {
vm.check_signals()?;
continue;
}
Err(e) => return Err(e.into()),
Ok(false) => {} // no timeout, continue as normal
}
}
let err = loop {
// loop on interrupt
match f() {
Ok(x) => return Ok(x),
Err(e) if e.kind() == io::ErrorKind::Interrupted => vm.check_signals()?,
Err(e) => break e,
}
};
if timeout.is_some() && err.kind() == io::ErrorKind::WouldBlock {
continue;
}
return Err(err.into());
}
}
fn extract_address(
&self,
addr: PyObjectRef,
caller: &str,
vm: &VirtualMachine,
) -> PyResult<socket2::SockAddr> {
let family = self.family.load();
match family {
#[cfg(unix)]
c::AF_UNIX => {
use std::os::unix::ffi::OsStrExt;
let buf = crate::byteslike::ArgStrOrBytesLike::try_from_object(vm, addr)?;
let path = &*buf.borrow_bytes();
if cfg!(any(target_os = "linux", target_os = "android")) && path.first() == Some(&0)
{
use libc::{sa_family_t, socklen_t};
use {socket2::SockAddr, std::ptr};
unsafe {
// based on SockAddr::unix
// TODO: upstream or fix socklen check for SockAddr::unix()?
SockAddr::init(|storage, len| {
// Safety: `SockAddr::init` zeros the address, which is a valid
// representation.
let storage: &mut libc::sockaddr_un = &mut *storage.cast();
let len: &mut socklen_t = &mut *len;
let bytes = path;
if bytes.len() > storage.sun_path.len() {
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"path must be shorter than SUN_LEN",
));
}
storage.sun_family = libc::AF_UNIX as sa_family_t;
// Safety: `bytes` and `addr.sun_path` are not overlapping and
// both point to valid memory.
// `SockAddr::init` zeroes the memory, so the path is already
// null terminated.
ptr::copy_nonoverlapping(
bytes.as_ptr(),
storage.sun_path.as_mut_ptr() as *mut u8,
bytes.len(),
);
let base = storage as *const _ as usize;
let path = &storage.sun_path as *const _ as usize;
let sun_path_offset = path - base;
let length = sun_path_offset + bytes.len();
*len = length as socklen_t;
Ok(())
})
}
.map(|(_, addr)| addr)
} else {
socket2::SockAddr::unix(ffi::OsStr::from_bytes(path))
}
.map_err(|_| vm.new_os_error("AF_UNIX path too long".to_owned()))
}
c::AF_INET => {
let tuple: PyTupleRef = addr.downcast().map_err(|obj| {
vm.new_type_error(format!(
"{}(): AF_INET address must be tuple, not {}",
caller,
obj.class().name()
))
})?;
let tuple = tuple.as_slice();
if tuple.len() != 2 {
return Err(
vm.new_type_error("AF_INET address must be a pair (host, post)".to_owned())
);
}
let addr = Address::from_tuple(tuple, vm)?;
let mut addr4 = get_addr(vm, addr.host, c::AF_INET)?;
match &mut addr4 {
SocketAddr::V4(addr4) => {
addr4.set_port(addr.port);
}
SocketAddr::V6(_) => unreachable!(),
}
Ok(addr4.into())
}
c::AF_INET6 => {
let tuple: PyTupleRef = addr.downcast().map_err(|obj| {
vm.new_type_error(format!(
"{}(): AF_INET6 address must be tuple, not {}",
caller,
obj.class().name()
))
})?;
let tuple = tuple.as_slice();
match tuple.len() {
2 | 3 | 4 => {}
_ => {
return Err(vm.new_type_error(
"AF_INET6 address must be a tuple (host, port[, flowinfo[, scopeid]])"
.to_owned(),
))
}
}
let (addr, flowinfo, scopeid) = Address::from_tuple_ipv6(tuple, vm)?;
let mut addr6 = get_addr(vm, addr.host, c::AF_INET6)?;
match &mut addr6 {
SocketAddr::V6(addr6) => {
addr6.set_port(addr.port);
addr6.set_flowinfo(flowinfo);
addr6.set_scope_id(scopeid);
}
SocketAddr::V4(_) => unreachable!(),
}
Ok(addr6.into())
}
_ => Err(vm.new_os_error(format!("{}(): bad family", caller))),
}
}
fn connect_inner(
&self,
address: PyObjectRef,
caller: &str,
vm: &VirtualMachine,
) -> Result<(), IoOrPyException> {
let sock_addr = self.extract_address(address, caller, vm)?;
let err = match self.sock(vm)?.connect(&sock_addr) {
Ok(()) => return Ok(()),
Err(e) => e,
};
let wait_connect = if err.kind() == io::ErrorKind::Interrupted {
vm.check_signals()?;
self.timeout.load() != 0.0
} else {
#[cfg(unix)]
use c::EINPROGRESS;
#[cfg(windows)]
use c::WSAEWOULDBLOCK as EINPROGRESS;
self.timeout.load() > 0.0 && err.raw_os_error() == Some(EINPROGRESS)
};
if wait_connect {
// basically, connect() is async, and it registers an "error" on the socket when it's
// done connecting. SelectKind::Connect fills the errorfds fd_set, so if we wake up
// from poll and the error is EISCONN then we know that the connect is done
self.sock_op_err(vm, SelectKind::Connect, || {
let sock = self.sock_io()?;
let err = sock.take_error()?;
match err {
Some(e) if e.raw_os_error() == Some(libc::EISCONN) => Ok(()),
Some(e) => Err(e),
// TODO: is this accurate?
None => Ok(()),
}
})
} else {
Err(err.into())
}
}
}
#[pyimpl(flags(BASETYPE))]
impl PySocket {
#[pyslot]
fn tp_new(cls: PyTypeRef, _args: FuncArgs, vm: &VirtualMachine) -> PyResult {
Self::default().into_pyresult_with_type(vm, cls)
}
#[pymethod(magic)]
fn init(
&self,
family: OptionalArg<i32>,
socket_kind: OptionalArg<i32>,
proto: OptionalArg<i32>,
fileno: OptionalOption<PyObjectRef>,
vm: &VirtualMachine,
) -> PyResult<()> {
let mut family = family.unwrap_or(-1);
let mut socket_kind = socket_kind.unwrap_or(-1);
let mut proto = proto.unwrap_or(-1);
let fileno = fileno
.flatten()
.map(|obj| get_raw_sock(obj, vm))
.transpose()?;
let sock;
if let Some(fileno) = fileno {
sock = sock_from_raw(fileno, vm)?;
match sock.local_addr() {
Ok(addr) if family == -1 => family = addr.family() as i32,
Err(e)
if family == -1
|| matches!(
e.raw_os_error(),
Some(errcode!(ENOTSOCK)) | Some(errcode!(EBADF))
) =>
{
std::mem::forget(sock);
return Err(e.into_pyexception(vm));
}
_ => {}
}
if socket_kind == -1 {
// TODO: when socket2 cuts a new release, type will be available on all os
// socket_kind = sock.r#type().map_err(|e| e.into_pyexception(vm))?.into();
let res = unsafe {
c::getsockopt(
sock_fileno(&sock) as _,
c::SOL_SOCKET,
c::SO_TYPE,
&mut socket_kind as *mut libc::c_int as *mut _,
&mut (std::mem::size_of::<i32>() as _),
)
};
if res < 0 {
return Err(super::os::errno_err(vm));
}
}
cfg_if::cfg_if! {
if #[cfg(any(
target_os = "android",
target_os = "freebsd",
target_os = "fuchsia",
target_os = "linux",
))] {
if proto == -1 {
proto = sock.protocol().map_err(|e| e.into_pyexception(vm))?.map_or(0, Into::into);
}
} else {
proto = 0;
}
}
} else {
if family == -1 {
family = c::AF_INET as i32
}
if socket_kind == -1 {
socket_kind = c::SOCK_STREAM
}
if proto == -1 {
proto = 0
}
sock = Socket::new(
Domain::from(family),
SocketType::from(socket_kind),
Some(Protocol::from(proto)),
)
.map_err(|err| err.into_pyexception(vm))?;
};
self.init_inner(family, socket_kind, proto, sock, vm)
}
#[pymethod]
fn connect(&self, address: PyObjectRef, vm: &VirtualMachine) -> PyResult<()> {
self.connect_inner(address, "connect", vm)
.map_err(|e| e.into_pyexception(vm))
}
#[pymethod]
fn connect_ex(&self, address: PyObjectRef, vm: &VirtualMachine) -> PyResult<i32> {
match self.connect_inner(address, "connect_ex", vm) {
Ok(()) => Ok(0),
Err(err) => err.errno(),
}
}
#[pymethod]
fn bind(&self, address: PyObjectRef, vm: &VirtualMachine) -> PyResult<()> {
let sock_addr = self.extract_address(address, "bind", vm)?;
self.sock(vm)?
.bind(&sock_addr)
.map_err(|err| err.into_pyexception(vm))
}
#[pymethod]
fn listen(&self, backlog: OptionalArg<i32>, vm: &VirtualMachine) -> PyResult<()> {
let backlog = backlog.unwrap_or(128);
let backlog = if backlog < 0 { 0 } else { backlog };
self.sock(vm)?
.listen(backlog)
.map_err(|err| err.into_pyexception(vm))
}
#[pymethod]
fn _accept(&self, vm: &VirtualMachine) -> PyResult<(RawSocket, PyObjectRef)> {
let (sock, addr) = self.sock_op(vm, SelectKind::Read, || self.sock_io()?.accept())?;
let fd = into_sock_fileno(sock);
Ok((fd, get_addr_tuple(&addr, vm)))
}
#[pymethod]
fn recv(
&self,
bufsize: usize,
flags: OptionalArg<i32>,
vm: &VirtualMachine,
) -> PyResult<Vec<u8>> {
let flags = flags.unwrap_or(0);
let mut buffer = Vec::with_capacity(bufsize);
let sock = self.sock(vm)?;
let n = self.sock_op(vm, SelectKind::Read, || {
sock.recv_with_flags(spare_capacity_mut(&mut buffer), flags)
})?;
unsafe { buffer.set_len(n) };
Ok(buffer)
}
#[pymethod]
fn recv_into(
&self,
buf: ArgMemoryBuffer,
flags: OptionalArg<i32>,
vm: &VirtualMachine,
) -> PyResult<usize> {
let flags = flags.unwrap_or(0);
let sock = self.sock(vm)?;
let mut buf = buf.borrow_buf_mut();
let buf = &mut *buf;
self.sock_op(vm, SelectKind::Read, || {
sock.recv_with_flags(slice_as_uninit(buf), flags)
})
}
#[pymethod]
fn recvfrom(
&self,
bufsize: isize,
flags: OptionalArg<i32>,
vm: &VirtualMachine,
) -> PyResult<(Vec<u8>, PyObjectRef)> {
let flags = flags.unwrap_or(0);
let bufsize = bufsize
.to_usize()
.ok_or_else(|| vm.new_value_error("negative buffersize in recvfrom".to_owned()))?;
let mut buffer = Vec::with_capacity(bufsize);
let (n, addr) = self.sock_op(vm, SelectKind::Read, || {
self.sock_io()?
.recv_from_with_flags(spare_capacity_mut(&mut buffer), flags)
})?;
unsafe { buffer.set_len(n) };
Ok((buffer, get_addr_tuple(&addr, vm)))
}
#[pymethod]
fn recvfrom_into(
&self,
buf: ArgMemoryBuffer,
nbytes: OptionalArg<isize>,
flags: OptionalArg<i32>,
vm: &VirtualMachine,
) -> PyResult<(usize, PyObjectRef)> {
let mut buf = buf.borrow_buf_mut();
let buf = &mut *buf;
let buf = match nbytes {
OptionalArg::Present(i) => {
let i = i.to_usize().ok_or_else(|| {
vm.new_value_error("negative buffersize in recvfrom_into".to_owned())
})?;
buf.get_mut(..i).ok_or_else(|| {
vm.new_value_error("nbytes is greater than the length of the buffer".to_owned())
})?
}
OptionalArg::Missing => buf,
};
let flags = flags.unwrap_or(0);
let sock = self.sock(vm)?;
let (n, addr) = self.sock_op(vm, SelectKind::Read, || {
sock.recv_from_with_flags(slice_as_uninit(buf), flags)
})?;
Ok((n, get_addr_tuple(&addr, vm)))
}
#[pymethod]
fn send(
&self,
bytes: ArgBytesLike,
flags: OptionalArg<i32>,
vm: &VirtualMachine,
) -> PyResult<usize> {
let flags = flags.unwrap_or(0);
let buf = bytes.borrow_buf();
let buf = &*buf;
self.sock_op(vm, SelectKind::Write, || {
self.sock_io()?.send_with_flags(buf, flags)
})
}
#[pymethod]
fn sendall(
&self,
bytes: ArgBytesLike,
flags: OptionalArg<i32>,
vm: &VirtualMachine,
) -> PyResult<()> {
let flags = flags.unwrap_or(0);
let timeout = self.get_timeout().ok();
let deadline = timeout.map(Deadline::new);
let buf = bytes.borrow_buf();
let buf = &*buf;
let mut buf_offset = 0;
// now we have like 3 layers of interrupt loop :)
while buf_offset < buf.len() {
let interval = deadline
.as_ref()
.map(|d| d.time_until().map_err(|e| e.into_pyexception(vm)))
.transpose()?;
self.sock_op_timeout_err(vm, SelectKind::Write, interval, || {
let subbuf = &buf[buf_offset..];
buf_offset += self.sock_io()?.send_with_flags(subbuf, flags)?;
Ok(())
})
.map_err(|e| e.into_pyexception(vm))?;
vm.check_signals()?;
}
Ok(())
}
#[pymethod]
fn sendto(
&self,
bytes: ArgBytesLike,
arg2: PyObjectRef,
arg3: OptionalArg<PyObjectRef>,
vm: &VirtualMachine,
) -> PyResult<usize> {
// signature is bytes[, flags], address
let (flags, address) = match arg3 {
OptionalArg::Present(arg3) => {
// should just be i32::try_from_obj but tests check for error message
let int = vm.to_index_opt(arg2).unwrap_or_else(|| {
Err(vm.new_type_error("an integer is required".to_owned()))
})?;
let flags = int::try_to_primitive::<i32>(int.as_bigint(), vm)?;
(flags, arg3)
}
OptionalArg::Missing => (0, arg2),
};
let addr = self.extract_address(address, "sendto", vm)?;
let buf = bytes.borrow_buf();
let buf = &*buf;
self.sock_op(vm, SelectKind::Write, || {
self.sock_io()?.send_to_with_flags(buf, &addr, flags)
})
}
#[pymethod]
fn close(&self, vm: &VirtualMachine) -> PyResult<()> {
let sock = self.detach();
if sock != INVALID_SOCKET {
close_inner(sock, vm)?;
}
Ok(())
}
#[pymethod]
#[inline]
fn detach(&self) -> RawSocket {
let sock = std::mem::replace(&mut *self.sock.write(), NullableSocket::invalid());
std::mem::ManuallyDrop::new(sock).fd()
}
#[pymethod]
fn fileno(&self) -> RawSocket {
self.sock.read().fd()
}
#[pymethod]
fn getsockname(&self, vm: &VirtualMachine) -> PyResult<PyObjectRef> {
let addr = self
.sock(vm)?
.local_addr()
.map_err(|err| err.into_pyexception(vm))?;
Ok(get_addr_tuple(&addr, vm))
}
#[pymethod]
fn getpeername(&self, vm: &VirtualMachine) -> PyResult<PyObjectRef> {
let addr = self
.sock(vm)?
.peer_addr()
.map_err(|err| err.into_pyexception(vm))?;
Ok(get_addr_tuple(&addr, vm))
}
#[pymethod]
fn gettimeout(&self) -> Option<f64> {
let timeout = self.timeout.load();
if timeout >= 0.0 {
Some(timeout)
} else {
None
}
}
#[pymethod]
fn setblocking(&self, block: bool, vm: &VirtualMachine) -> PyResult<()> {
self.timeout.store(if block { -1.0 } else { 0.0 });
self.sock(vm)?
.set_nonblocking(!block)
.map_err(|err| err.into_pyexception(vm))
}
#[pymethod]
fn getblocking(&self) -> bool {
self.timeout.load() != 0.0
}
#[pymethod]
fn settimeout(&self, timeout: Option<Duration>, vm: &VirtualMachine) -> PyResult<()> {
self.timeout
.store(timeout.map_or(-1.0, |d| d.as_secs_f64()));
// even if timeout is > 0 the socket needs to be nonblocking in order for us to select() on
// it
self.sock(vm)?
.set_nonblocking(timeout.is_some())
.map_err(|err| err.into_pyexception(vm))
}
#[pymethod]
fn getsockopt(
&self,
level: i32,
name: i32,
buflen: OptionalArg<i32>,
vm: &VirtualMachine,
) -> PyResult {
let fd = self.sock.read().fd() as _;
let buflen = buflen.unwrap_or(0);
if buflen == 0 {
let mut flag: libc::c_int = 0;
let mut flagsize = std::mem::size_of::<libc::c_int>() as _;
let ret = unsafe {
c::getsockopt(
fd,
level,
name,
&mut flag as *mut libc::c_int as *mut _,
&mut flagsize,
)
};
if ret < 0 {
Err(super::os::errno_err(vm))
} else {
Ok(vm.ctx.new_int(flag))
}
} else {
if buflen <= 0 || buflen > 1024 {
return Err(vm.new_os_error("getsockopt buflen out of range".to_owned()));
}
let mut buf = vec![0u8; buflen as usize];
let mut buflen = buflen as _;
let ret =
unsafe { c::getsockopt(fd, level, name, buf.as_mut_ptr() as *mut _, &mut buflen) };
buf.truncate(buflen as usize);
if ret < 0 {
Err(super::os::errno_err(vm))
} else {
Ok(vm.ctx.new_bytes(buf))
}
}
}
#[pymethod]
fn setsockopt(
&self,
level: i32,
name: i32,
value: Option<Either<ArgBytesLike, i32>>,
optlen: OptionalArg<u32>,
vm: &VirtualMachine,
) -> PyResult<()> {
let fd = self.sock.read().fd() as _;
let ret = match (value, optlen) {
(Some(Either::A(b)), OptionalArg::Missing) => b.with_ref(|b| unsafe {
c::setsockopt(fd, level, name, b.as_ptr() as *const _, b.len() as _)
}),
(Some(Either::B(ref val)), OptionalArg::Missing) => unsafe {
c::setsockopt(
fd,
level,
name,
val as *const i32 as *const _,
std::mem::size_of::<i32>() as _,
)
},
(None, OptionalArg::Present(optlen)) => unsafe {
c::setsockopt(fd, level, name, std::ptr::null(), optlen as _)
},
_ => {
return Err(
vm.new_type_error("expected the value arg xor the optlen arg".to_owned())
);
}
};
if ret < 0 {
Err(super::os::errno_err(vm))
} else {
Ok(())
}
}
#[pymethod]
fn shutdown(&self, how: i32, vm: &VirtualMachine) -> PyResult<()> {
let how = match how {
c::SHUT_RD => Shutdown::Read,
c::SHUT_WR => Shutdown::Write,
c::SHUT_RDWR => Shutdown::Both,
_ => {
return Err(
vm.new_value_error("`how` must be SHUT_RD, SHUT_WR, or SHUT_RDWR".to_owned())
)
}
};
self.sock(vm)?
.shutdown(how)
.map_err(|err| err.into_pyexception(vm))
}
#[pyproperty(name = "type")]
fn kind(&self) -> i32 {
self.kind.load()
}
#[pyproperty]
fn family(&self) -> i32 {
self.family.load()
}
#[pyproperty]
fn proto(&self) -> i32 {
self.proto.load()
}
#[pymethod(magic)]
fn repr(&self) -> String {
format!(
"<socket object, fd={}, family={}, type={}, proto={}>",
// cast because INVALID_SOCKET is unsigned, so would show usize::MAX instead of -1
self.sock.read().fd() as i64,
self.family.load(),
self.kind.load(),
self.proto.load(),
)
}
}
struct Address {
host: PyStrRef,
port: u16,
}
impl ToSocketAddrs for Address {
type Iter = std::vec::IntoIter<SocketAddr>;
fn to_socket_addrs(&self) -> io::Result<Self::Iter> {
(self.host.as_str(), self.port).to_socket_addrs()
}
}
impl TryFromObject for Address {
fn try_from_object(vm: &VirtualMachine, obj: PyObjectRef) -> PyResult<Self> {
let tuple = PyTupleRef::try_from_object(vm, obj)?;
if tuple.as_slice().len() != 2 {
Err(vm.new_type_error("Address tuple should have only 2 values".to_owned()))
} else {
Self::from_tuple(tuple.as_slice(), vm)
}
}
}
impl Address {
fn from_tuple(tuple: &[PyObjectRef], vm: &VirtualMachine) -> PyResult<Self> {
let host = PyStrRef::try_from_object(vm, tuple[0].clone())?;
let port = i32::try_from_borrowed_object(vm, &tuple[1])?;
let port = port
.to_u16()
.ok_or_else(|| vm.new_overflow_error("port must be 0-65535.".to_owned()))?;
Ok(Address { host, port })
}
fn from_tuple_ipv6(tuple: &[PyObjectRef], vm: &VirtualMachine) -> PyResult<(Self, u32, u32)> {
let addr = Address::from_tuple(tuple, vm)?;
let flowinfo = tuple
.get(2)
.map(|obj| u32::try_from_borrowed_object(vm, obj))
.transpose()?
.unwrap_or(0);
let scopeid = tuple
.get(3)
.map(|obj| u32::try_from_borrowed_object(vm, obj))
.transpose()?
.unwrap_or(0);
if flowinfo > 0xfffff {
return Err(vm.new_overflow_error("flowinfo must be 0-1048575.".to_owned()));
}
Ok((addr, flowinfo, scopeid))
}
}
fn get_ip_addr_tuple(addr: &SocketAddr, vm: &VirtualMachine) -> PyObjectRef {
match addr {
SocketAddr::V4(addr) => (addr.ip().to_string(), addr.port()).into_pyobject(vm),
SocketAddr::V6(addr) => (
addr.ip().to_string(),
addr.port(),
addr.flowinfo(),
addr.scope_id(),
)