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2288 lines (2036 loc) · 116 KB
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the Apache 2.0 License.
// See the LICENSE file in the project root for more information.
#nullable enable
#if FEATURE_FULL_NET
using System;
using System.Buffers;
using System.Collections.Generic;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Numerics;
using System.Runtime.InteropServices;
using System.Runtime.Versioning;
using System.Text;
using IronPython.Runtime;
using IronPython.Runtime.Exceptions;
using IronPython.Runtime.Operations;
using IronPython.Runtime.Types;
using Microsoft.Scripting;
using Microsoft.Scripting.Runtime;
using SpecialNameAttribute = System.Runtime.CompilerServices.SpecialNameAttribute;
[assembly: PythonModule("_socket", typeof(IronPython.Modules.PythonSocket))]
namespace IronPython.Modules {
public static class PythonSocket {
private static readonly object _defaultTimeoutKey = new object();
private static readonly object _defaultBufsizeKey = new object();
private const int DefaultBufferSize = 8192;
[SpecialName]
public static void PerformModuleReload(PythonContext/*!*/ context, PythonDictionary/*!*/ dict) {
if (!context.HasModuleState(_defaultTimeoutKey)) {
context.SetModuleState(_defaultTimeoutKey, null);
}
context.SetModuleState(_defaultBufsizeKey, DefaultBufferSize);
context.EnsureModuleException("socketherror", error, dict, "herror", "socket");
context.EnsureModuleException("socketgaierror", error, dict, "gaierror", "socket");
context.EnsureModuleException("sockettimeout", error, dict, "timeout", "socket");
}
public static PythonType error => PythonExceptions.OSError;
public const string __doc__ = "Implementation module for socket operations.\n\n"
+ "This module is a loose wrapper around the .NET System.Net.Sockets API, so you\n"
+ "may find the corresponding MSDN documentation helpful in decoding error\n"
+ "messages and understanding corner cases.\n"
+ "\n"
+ "This implementation of socket differs slightly from the standard CPython\n"
+ "socket module. Many of these differences are due to the implementation of the\n"
+ ".NET socket libraries. These differences are summarized below. For full\n"
+ "details, check the docstrings of the functions mentioned.\n"
+ " - s.accept(), s.connect(), and s.connect_ex() do not support timeouts.\n"
+ " - Timeouts in s.sendall() don't work correctly.\n"
+ " - s.dup() is not implemented.\n"
+ " - SSL support is not implemented."
+ "\n"
+ "An Extra IronPython-specific function is exposed only if the clr module is\n"
+ "imported:\n"
+ " - s.HandleToSocket() returns the System.Net.Sockets.Socket object associated\n"
+ " with a particular \"file descriptor number\" (as returned by s.fileno()).\n"
;
#region Socket object
public static PythonType SocketType = DynamicHelpers.GetPythonTypeFromType(typeof(socket));
[PythonType]
[Documentation("socket([family[, type[, proto]]]) -> socket object\n\n"
+ "Create a socket (a network connection endpoint) of the given family, type,\n"
+ "and protocol. socket() accepts keyword arguments.\n"
+ " - family (address family) defaults to AF_INET\n"
+ " - type (socket type) defaults to SOCK_STREAM\n"
+ " - proto (protocol type) defaults to 0, which specifies the default protocol\n"
+ "\n"
+ "This module supports only IP sockets. It does not support raw or Unix sockets.\n"
+ "Both IPv4 and IPv6 are supported.")]
public class socket : IWeakReferenceable {
#region Fields
/// <summary>
/// handleToSocket allows us to translate from Python's idea of a socket resource (file
/// descriptor numbers) to .NET's idea of a socket resource (System.Net.Socket objects).
/// In particular, this allows the select module to convert file numbers (as returned by
/// fileno()) and convert them to Socket objects so that it can do something useful with them.
/// </summary>
private static readonly Dictionary<IntPtr, WeakReference> _handleToSocket = new Dictionary<IntPtr, WeakReference>();
private const int DefaultAddressFamily = (int)AddressFamily.InterNetwork;
private const int DefaultSocketType = (int)System.Net.Sockets.SocketType.Stream;
private const int DefaultProtocolType = (int)ProtocolType.Unspecified;
internal Socket _socket;
internal string? _hostName;
private WeakRefTracker? _weakRefTracker;
private int _referenceCount = 1; // TODO: this is no longer incremented by anything...
public const string __module__ = "socket";
internal CodeContext/*!*/ _context;
private int _timeout;
#endregion
#region Public API
#pragma warning disable CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
public socket() { } // TODO: _socket and _context are null!
#pragma warning restore CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
public void __init__(CodeContext/*!*/ context, int family = DefaultAddressFamily,
int type = DefaultSocketType,
int proto = DefaultProtocolType,
object? fileno = null) {
var socketType = (SocketType)Enum.ToObject(typeof(SocketType), type);
if (!Enum.IsDefined(typeof(SocketType), socketType)) {
throw MakeException(context, new SocketException((int)SocketError.SocketNotSupported));
}
var addressFamily = (AddressFamily)Enum.ToObject(typeof(AddressFamily), family);
if (!Enum.IsDefined(typeof(AddressFamily), addressFamily)) {
throw MakeException(context, new SocketException((int)SocketError.AddressFamilyNotSupported));
}
var protocolType = (ProtocolType)Enum.ToObject(typeof(ProtocolType), proto);
if (!Enum.IsDefined(typeof(ProtocolType), protocolType)) {
throw MakeException(context, new SocketException((int)SocketError.ProtocolNotSupported));
}
Socket? socket = null;
if (fileno is socket sock) {
socket = sock._socket;
_hostName = sock._hostName;
// we now own the lifetime of the socket
GC.SuppressFinalize(sock);
} else if (fileno != null) {
if (!PythonOps.TryToIndex(fileno, out object? handleObj)) {
throw PythonOps.TypeErrorForUnIndexableObject(fileno);
}
long handle = Converter.ConvertToInt64(handleObj);
// Windows reserves only INVALID_SOCKET (~0) as an invalid handle
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ? handle == -1 : handle < 0) {
throw PythonOps.ValueError("negative file descriptor");
}
socket = HandleToSocket(handle);
if (socket is null) {
throw PythonOps.OSError(RuntimeInformation.IsOSPlatform(OSPlatform.Windows)
? PythonErrno.WSAENOTSOCK : PythonErrno.EBADF,
"Bad file descriptor");
}
} else {
try {
socket = new Socket(addressFamily, socketType, protocolType);
if (ClrModule.IsMono) {
// for whatever reason Mono sets this to true on Linux
socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, false);
}
} catch (SocketException e) {
throw MakeException(context, e);
}
}
Initialize(context, socket);
}
public void __del__() {
_close();
}
~socket() {
_close();
}
private IAsyncResult? _acceptResult;
[Documentation("accept() -> (conn, address)\n\n"
+ "Accept a connection. The socket must be bound and listening before calling\n"
+ "accept(). conn is a new socket object connected to the remote host, and\n"
+ "address is the remote host's address (e.g. a (host, port) tuple for IPv4).\n"
+ "\n"
)]
public PythonTuple _accept() {
socket wrappedRemoteSocket;
Socket realRemoteSocket;
try {
if (_acceptResult != null && _acceptResult.IsCompleted) {
// previous async result has completed
realRemoteSocket = _socket.EndAccept(_acceptResult);
} else {
int timeoutTime = _timeout;
if (timeoutTime != 0) {
// use the existing or create a new async request
var asyncResult = _acceptResult ?? _socket.BeginAccept((x) => { }, null);
if (asyncResult.AsyncWaitHandle.WaitOne(timeoutTime)) {
// it's completed, end and throw it away
realRemoteSocket = _socket.EndAccept(asyncResult);
_acceptResult = null;
} else {
// save the async result for later incase it completes
_acceptResult = asyncResult;
throw new SocketException((int)SocketError.TimedOut);
}
} else {
realRemoteSocket = _socket.Accept();
}
}
} catch (Exception e) {
throw MakeException(_context, e);
}
wrappedRemoteSocket = new socket(_context, realRemoteSocket);
return PythonTuple.MakeTuple(wrappedRemoteSocket, wrappedRemoteSocket.getpeername());
}
[Documentation("bind(address) -> None\n\n"
+ "Bind to an address. If the socket is already bound, socket.error is raised.\n"
+ "For IP sockets, address is a (host, port) tuple. Raw sockets are not\n"
+ "supported.\n"
+ "\n"
+ "If you do not care which local address is assigned, set host to INADDR_ANY and\n"
+ "the system will assign the most appropriate network address. Similarly, if you\n"
+ "set port to 0, the system will assign an available port number between 1024\n"
+ "and 5000."
)]
public void bind([NotNone] PythonTuple address) {
IPEndPoint localEP = TupleToEndPoint(_context, address, _socket.AddressFamily, out _hostName);
try {
_socket.Bind(localEP);
} catch (Exception e) {
throw MakeException(_context, e);
}
}
[Documentation("close() -> None\n\nClose the socket. It cannot be used after being closed.")]
public void close() {
var refs = System.Threading.Interlocked.Decrement(ref _referenceCount);
// Don't actually close the socket if other file objects are
// still referring to this socket.
if (refs < 1) {
_close();
}
}
private void _close() {
if (_socket != null) {
lock (_handleToSocket) {
if (_handleToSocket.TryGetValue(_socket.Handle, out WeakReference? weakref)) {
Socket? target = weakref.Target as Socket;
if (target == _socket || target == null) {
_handleToSocket.Remove(_socket.Handle);
}
}
}
((IDisposable)_socket).Dispose();
if (System.Threading.Interlocked.Exchange(ref _referenceCount, 0) > 0) {
try { // this may throw when called from the Finalizer (on Mono) so just swallow any exception
PythonOps.Warn(_context, PythonExceptions.ResourceWarning, $"unclosed {PythonOps.Repr(_context, this)}");
} catch { }
}
}
}
[Documentation("connect(address) -> None\n\n"
+ "Connect to a remote socket at the given address. IP addresses are expressed\n"
+ "as (host, port).\n"
+ "\n"
+ "Raises socket.error if the socket has been closed, the socket is listening, or\n"
+ "another connection error occurred."
+ "\n"
+ "Difference from CPython: connect() does not support timeouts in blocking mode.\n"
+ "If a timeout is set and the socket is in blocking mode, connect() will block\n"
+ "indefinitely until a connection is made or an error occurs."
)]
public void connect([NotNone] PythonTuple address) {
IPEndPoint remoteEP = TupleToEndPoint(_context, address, _socket.AddressFamily, out _hostName);
try {
_socket.Connect(remoteEP);
} catch (Exception e) {
throw MakeException(_context, e);
}
}
[Documentation("connect_ex(address) -> error_code\n\n"
+ "Like connect(), but return an error code insted of raising an exception for\n"
+ "socket exceptions raised by the underlying system Connect() call. Note that\n"
+ "exceptions other than SocketException generated by the system Connect() call\n"
+ "will still be raised.\n"
+ "\n"
+ "A return value of 0 indicates that the connect call was successful."
+ "\n"
+ "Difference from CPython: connect_ex() does not support timeouts in blocking\n"
+ "mode. If a timeout is set and the socket is in blocking mode, connect_ex() will\n"
+ "block indefinitely until a connection is made or an error occurs."
)]
public int connect_ex([NotNone] PythonTuple address) {
IPEndPoint remoteEP = TupleToEndPoint(_context, address, _socket.AddressFamily, out _hostName);
try {
_socket.Connect(remoteEP);
} catch (SocketException ex) {
return !ClrModule.IsMono ? ex.NativeErrorCode : MapMonoSocketErrorToErrno(ex.SocketErrorCode);
}
return PythonErrno.ENOERROR;
}
public long detach() {
var fd = fileno();
_socket = null!; // TODO: this is wrong, no null checks on _socket anywhere!
return fd;
}
[Documentation("fileno() -> file_handle\n\n"
+ "Return the underlying system handle for this socket (a 64-bit integer)."
)]
public long fileno() {
try {
return _socket.Handle.ToInt64();
} catch (Exception e) {
throw MakeException(_context, e);
}
}
[Documentation("getpeername() -> address\n\n"
+ "Return the address of the remote end of this socket. The address format is\n"
+ "family-dependent (e.g. a (host, port) tuple for IPv4)."
)]
public PythonTuple getpeername() {
try {
IPEndPoint? remoteEP = _socket.RemoteEndPoint as IPEndPoint;
if (remoteEP == null) {
throw MakeException(_context, new SocketException((int)SocketError.NotConnected));
}
return EndPointToTuple(remoteEP);
} catch (Exception e) {
throw MakeException(_context, e);
}
}
[Documentation("getsockname() -> address\n\n"
+ "Return the address of the local end of this socket. The address format is\n"
+ "family-dependent (e.g. a (host, port) tuple for IPv4)."
)]
public PythonTuple getsockname() {
try {
IPEndPoint? localEP = _socket.LocalEndPoint as IPEndPoint;
if (localEP == null) {
throw MakeException(_context, new SocketException((int)SocketError.InvalidArgument));
}
return EndPointToTuple(localEP);
} catch (Exception e) {
throw MakeException(_context, e);
}
}
[Documentation("getsockopt(level, optname[, buflen]) -> value\n\n"
+ "Return the value of a socket option. level is one of the SOL_* constants\n"
+ "defined in this module, and optname is one of the SO_* constants. If buflen is\n"
+ "omitted or zero, an integer value is returned. If it is present, a byte string\n"
+ "whose maximum length is buflen bytes) is returned. The caller must the decode\n"
+ "the resulting byte string."
)]
public object getsockopt(int optionLevel, int optionName, int optionLength = 0) {
SocketOptionLevel level = (SocketOptionLevel)Enum.ToObject(typeof(SocketOptionLevel), optionLevel);
if (!Enum.IsDefined(typeof(SocketOptionLevel), level)) {
throw MakeException(_context, new SocketException((int)SocketError.InvalidArgument));
}
SocketOptionName name = (SocketOptionName)Enum.ToObject(typeof(SocketOptionName), optionName);
if (!Enum.IsDefined(typeof(SocketOptionName), name)) {
throw MakeException(_context, new SocketException((int)SocketError.ProtocolOption));
}
try {
if (optionLength == 0) {
// Integer return value
return (int)_socket.GetSocketOption(level, name)!;
} else {
// Byte string return value
return _socket.GetSocketOption(level, name, optionLength).MakeString();
}
} catch (Exception e) {
throw MakeException(_context, e);
}
}
[Documentation("listen(backlog) -> None\n\n"
+ "Listen for connections on the socket. Backlog is the maximum length of the\n"
+ "pending connections queue. The maximum value is system-dependent."
)]
public void listen() => listen(Math.Min(SOMAXCONN, 128)); // new in CPython 3.5
public void listen(int backlog) {
try {
_socket.Listen(backlog);
} catch (Exception e) {
throw MakeException(_context, e);
}
}
private static ArrayPool<byte> ArrayPool => ArrayPool<byte>.Shared;
[Documentation("recv(bufsize[, flags]) -> string\n\n"
+ "Receive data from the socket, up to bufsize bytes. For connection-oriented\n"
+ "protocols (e.g. SOCK_STREAM), you must first call either connect() or\n"
+ "accept(). Connectionless protocols (e.g. SOCK_DGRAM) may also use recvfrom().\n"
+ "\n"
+ "recv() blocks until data is available, unless a timeout was set using\n"
+ "settimeout(). If the timeout was exceeded, socket.timeout is raised."
+ "recv() returns immediately with zero bytes when the connection is closed."
)]
public Bytes recv(int bufsize, int flags = 0) {
if (bufsize < 0) throw PythonOps.ValueError($"negative buffersize in {nameof(recv)}");
var buffer = ArrayPool.Rent(bufsize);
try {
int bytesRead;
try {
bytesRead = _socket.Receive(buffer, bufsize, (SocketFlags)flags);
} catch (Exception e) {
throw MakeException(_context, e);
}
var bytes = new byte[bytesRead];
Array.Copy(buffer, bytes, bytes.Length);
return Bytes.Make(bytes);
} finally {
ArrayPool.Return(buffer);
}
}
[Documentation("recv_into(memoryview, [nbytes[, flags]]) -> nbytes_read\n\n"
+ "A version of recv() that stores its data into a bytearray rather than creating\n"
+ "a new string. Receive up to buffersize bytes from the socket. If buffersize\n"
+ "is not specified (or 0), receive up to the size available in the given buffer.\n\n"
+ "See recv() for documentation about the flags.\n"
)]
public int recv_into([NotNone] IBufferProtocol buffer, int nbytes = 0, int flags = 0) {
using var buf = buffer.GetBufferNoThrow(BufferFlags.Writable);
if (buf is null) throw PythonOps.TypeError($"{nameof(recv_into)}() argument 1 must be read-write buffer, not {PythonOps.GetPythonTypeName(buffer)}");
var span = buf.AsSpan();
if (nbytes < 0) throw PythonOps.ValueError("negative buffersize in " + nameof(recv_into));
if (nbytes > span.Length) throw PythonOps.ValueError("buffer too small for requested bytes");
if (nbytes == 0) nbytes = span.Length;
var byteBuffer = ArrayPool.Rent(nbytes);
try {
IPEndPoint remoteIPEP = new IPEndPoint(IPAddress.Any, 0);
EndPoint remoteEP = remoteIPEP;
int bytesRead;
try {
bytesRead = _socket.Receive(byteBuffer, nbytes, (SocketFlags)flags);
} catch (Exception e) {
throw MakeException(_context, e);
}
byteBuffer.AsSpan(0, bytesRead).CopyTo(span);
return bytesRead;
} finally {
ArrayPool.Return(byteBuffer);
}
}
[Documentation("")]
public int recv_into(object? buffer, int nbytes = 0, int flags = 0) {
if (Converter.TryConvert<IBufferProtocol>(buffer, out var bufferProtocol) && bufferProtocol is not null) {
return recv_into(bufferProtocol, nbytes, flags);
}
throw PythonOps.TypeError($"{nameof(recv_into)}() argument 1 must be read-write buffer, not {PythonOps.GetPythonTypeName(buffer)}");
}
[Documentation("recvfrom(bufsize[, flags]) -> (string, address)\n\n"
+ "Receive data from the socket, up to bufsize bytes. string is the data\n"
+ "received, and address (whose format is protocol-dependent) is the address of\n"
+ "the socket from which the data was received."
)]
public PythonTuple recvfrom(int bufsize, int flags = 0) {
if (bufsize < 0) throw PythonOps.ValueError($"negative buffersize in {nameof(recvfrom)}");
var buffer = ArrayPool.Rent(bufsize);
try {
IPEndPoint remoteIPEP = new IPEndPoint(IPAddress.Any, 0);
EndPoint remoteEP = remoteIPEP;
int bytesRead;
try {
bytesRead = _socket.ReceiveFrom(buffer, bufsize, (SocketFlags)flags, ref remoteEP);
} catch (Exception e) {
throw MakeException(_context, e);
}
var bytes = new byte[bytesRead];
Array.Copy(buffer, bytes, bytes.Length);
return PythonTuple.MakeTuple(Bytes.Make(bytes), EndPointToTuple((IPEndPoint)remoteEP));
} finally {
ArrayPool.Return(buffer);
}
}
[Documentation("recvfrom_into(buffer[, nbytes[, flags]]) -> (nbytes, address info)\n\n"
+ "Like recv_into(buffer[, nbytes[, flags]]) but also return the sender's address info.\n"
)]
public PythonTuple recvfrom_into([NotNone] IBufferProtocol buffer, int nbytes = 0, int flags = 0) {
using var buf = buffer.GetBufferNoThrow(BufferFlags.Writable);
if (buf is null) throw PythonOps.TypeError($"{nameof(recvfrom_into)}() argument 1 must be read-write buffer, not {PythonOps.GetPythonTypeName(buffer)}");
var span = buf.AsSpan();
if (nbytes < 0) throw PythonOps.ValueError("negative buffersize in " + nameof(recvfrom_into));
if (nbytes > span.Length) throw PythonOps.ValueError("nbytes is greater than the length of the buffer");
if (nbytes == 0) nbytes = span.Length;
var byteBuffer = ArrayPool.Rent(nbytes);
try {
IPEndPoint remoteIPEP = new IPEndPoint(IPAddress.Any, 0);
EndPoint remoteEP = remoteIPEP;
int bytesRead;
try {
bytesRead = _socket.ReceiveFrom(byteBuffer, nbytes, (SocketFlags)flags, ref remoteEP);
} catch (Exception e) {
throw MakeException(_context, e);
}
byteBuffer.AsSpan(0, bytesRead).CopyTo(span);
return PythonTuple.MakeTuple(bytesRead, EndPointToTuple((IPEndPoint)remoteEP));
} finally {
ArrayPool.Return(byteBuffer);
}
}
[Documentation("")]
public PythonTuple recvfrom_into(object? buffer, int nbytes = 0, int flags = 0) {
if (Converter.TryConvert<IBufferProtocol>(buffer, out var bufferProtocol) && bufferProtocol is not null) {
return recvfrom_into(bufferProtocol, nbytes, flags);
}
throw PythonOps.TypeError($"{nameof(recvfrom_into)}() argument 1 must be read-write buffer, not {PythonOps.GetPythonTypeName(buffer)}");
}
private static int byteBufferSize(string funcName, int nbytes, int bufLength, int itemSize = 1) {
if (nbytes < 0) {
throw PythonOps.ValueError("negative buffersize in " + funcName);
} else if (nbytes == 0) {
return bufLength * itemSize;
} else {
int remainder = nbytes % itemSize;
return Math.Min(remainder == 0 ? nbytes : nbytes + itemSize - remainder,
bufLength * itemSize);
}
}
[Documentation("send(string[, flags]) -> bytes_sent\n\n"
+ "Send data to the remote socket. The socket must be connected to a remote\n"
+ "socket (by calling either connect() or accept(). Returns the number of bytes\n"
+ "sent to the remote socket.\n"
+ "\n"
+ "Note that the successful completion of a send() call does not mean that all of\n"
+ "the data was sent. The caller must keep track of the number of bytes sent and\n"
+ "retry the operation until all of the data has been sent.\n"
+ "\n"
+ "Also note that there is no guarantee that the data you send will appear on the\n"
+ "network immediately. To increase network efficiency, the underlying system may\n"
+ "delay transmission until a significant amount of outgoing data is collected. A\n"
+ "successful completion of the Send method means that the underlying system has\n"
+ "had room to buffer your data for a network send"
)]
public int send([NotNone] Bytes data, int flags = 0) {
return sendWorker(data.UnsafeByteArray, flags);
}
public int send([NotNone] IBufferProtocol data, int flags = 0) {
using IPythonBuffer buffer = data.GetBuffer();
return sendWorker(buffer.AsUnsafeArray() ?? buffer.ToArray(), flags);
}
private int sendWorker(byte[] buffer, int flags) {
try {
return _socket.Send(buffer, (SocketFlags)flags);
} catch (Exception e) {
throw MakeException(_context, e);
}
}
[Documentation("sendall(string[, flags]) -> None\n\n"
+ "Send data to the remote socket. The socket must be connected to a remote\n"
+ "socket (by calling either connect() or accept().\n"
+ "\n"
+ "Unlike send(), sendall() blocks until all of the data has been sent or until a\n"
+ "timeout or an error occurs. None is returned on success. If an error occurs,\n"
+ "there is no way to tell how much data, if any, was sent.\n"
+ "\n"
+ "Difference from CPython: timeouts do not function as you would expect. The\n"
+ "function is implemented using multiple calls to send(), so the timeout timer\n"
+ "is reset after each of those calls. That means that the upper bound on the\n"
+ "time that it will take for sendall() to return is the number of bytes in\n"
+ "string times the timeout interval.\n"
+ "\n"
+ "Also note that there is no guarantee that the data you send will appear on the\n"
+ "network immediately. To increase network efficiency, the underlying system may\n"
+ "delay transmission until a significant amount of outgoing data is collected. A\n"
+ "successful completion of the Send method means that the underlying system has\n"
+ "had room to buffer your data for a network send"
)]
public void sendall([NotNone] Bytes data, int flags = 0) {
sendallWorker(data.UnsafeByteArray, flags);
}
public void sendall([NotNone] IBufferProtocol data, int flags = 0) {
using IPythonBuffer buffer = data.GetBuffer();
sendallWorker(buffer.AsUnsafeArray() ?? buffer.ToArray(), flags);
}
private void sendallWorker(byte[] buffer, int flags) {
try {
int bytesTotal = buffer.Length;
int bytesRemaining = bytesTotal;
while (bytesRemaining > 0) {
bytesRemaining -= _socket.Send(buffer, bytesTotal - bytesRemaining, bytesRemaining, (SocketFlags)flags);
}
} catch (Exception e) {
throw MakeException(_context, e);
}
}
[Documentation("sendto(string[, flags], address) -> bytes_sent\n\n"
+ "Send data to the remote socket. The socket does not need to be connected to a\n"
+ "remote socket since the address is specified in the call to sendto(). Returns\n"
+ "the number of bytes sent to the remote socket.\n"
+ "\n"
+ "Blocking sockets will block until the all of the bytes in the buffer are sent.\n"
+ "Since a nonblocking Socket completes immediately, it might not send all of the\n"
+ "bytes in the buffer. It is your application's responsibility to keep track of\n"
+ "the number of bytes sent and to retry the operation until the application sends\n"
+ "all of the bytes in the buffer.\n"
+ "\n"
+ "Note that there is no guarantee that the data you send will appear on the\n"
+ "network immediately. To increase network efficiency, the underlying system may\n"
+ "delay transmission until a significant amount of outgoing data is collected. A\n"
+ "successful completion of the Send method means that the underlying system has\n"
+ "had room to buffer your data for a network send"
)]
public int sendto([NotNone] Bytes data, int flags, [NotNone] PythonTuple address) {
return sendtoWorker(data.UnsafeByteArray, flags, address);
}
public int sendto([NotNone] IBufferProtocol data, int flags, [NotNone] PythonTuple address) {
using IPythonBuffer buffer = data.GetBuffer();
return sendtoWorker(buffer.AsUnsafeArray() ?? buffer.ToArray(), flags, address);
}
[Documentation("")]
public int sendto([NotNone] Bytes data, [NotNone] PythonTuple address)
=> sendto(data, 0, address);
public int sendto([NotNone] IBufferProtocol data, [NotNone] PythonTuple address)
=> sendto(data, 0, address);
private int sendtoWorker(byte[] buffer, int flags, PythonTuple address) {
EndPoint remoteEP = TupleToEndPoint(_context, address, _socket.AddressFamily, out _hostName);
try {
return _socket.SendTo(buffer, (SocketFlags)flags, remoteEP);
} catch (Exception e) {
throw MakeException(_context, e);
}
}
[Documentation("setblocking(flag) -> None\n\n"
+ "Set the blocking mode of the socket. If flag is 0, the socket will be set to\n"
+ "non-blocking mode; otherwise, it will be set to blocking mode. If the socket is\n"
+ "in blocking mode, and a method is called (such as send() or recv() which does\n"
+ "not complete immediately, the caller will block execution until the requested\n"
+ "operation completes. In non-blocking mode, a socket.timeout exception would\n"
+ "would be raised in this case.\n"
+ "\n"
+ "Note that changing blocking mode also affects the timeout setting:\n"
+ "setblocking(0) is equivalent to settimeout(0), and setblocking(1) is equivalent\n"
+ "to settimeout(None)."
)]
public void setblocking(int shouldBlock) {
if (shouldBlock == 0) {
settimeout(0);
} else {
settimeout(null);
}
}
[Documentation("settimeout(value) -> None\n\n"
+ "Set a timeout on blocking socket methods. value may be either None or a\n"
+ "non-negative float, with one of the following meanings:\n"
+ " - None: disable timeouts and block indefinitely"
+ " - 0.0: don't block at all (return immediately if the operation can be\n"
+ " completed; raise socket.error otherwise)\n"
+ " - float > 0.0: block for up to the specified number of seconds; raise\n"
+ " socket.timeout if the operation cannot be completed in time\n"
+ "\n"
+ "settimeout(None) is equivalent to setblocking(1), and settimeout(0.0) is\n"
+ "equivalent to setblocking(0)."
+ "\n"
+ "If the timeout is non-zero and is less than 0.5, it will be set to 0.5. This\n"
+ "limitation is specific to IronPython.\n"
)]
// NOTE: The above IronPython specific timeout behavior is due to the underlying
// .Net Socket.SendTimeout behavior and is outside of our control.
public void settimeout(object? timeout) {
bool blocking = true;
int timeoutVal = 0;
if (timeout is not null) {
double seconds;
seconds = Converter.ConvertToDouble(timeout);
if (seconds < 0) {
throw PythonOps.ValueError("Timeout value out of range");
}
blocking = seconds > 0; // 0 timeout means non-blocking mode
timeoutVal = (int)(seconds * MillisecondsPerSecond);
}
try {
_socket.Blocking = blocking;
_socket.SendTimeout = timeoutVal;
_socket.ReceiveTimeout = _socket.SendTimeout;
_timeout = timeoutVal;
} catch (Exception ex) {
throw MakeException(_context, ex);
}
}
[Documentation("gettimeout() -> value\n\n"
+ "Return the timeout duration in seconds for this socket as a float. If no\n"
+ "timeout is set, return None. For more details on timeouts and blocking, see the\n"
+ "Python socket module documentation."
)]
public object? gettimeout() {
try {
if (_socket.Blocking && _socket.SendTimeout == 0) {
return null;
} else {
return (double)_socket.SendTimeout / MillisecondsPerSecond;
}
} catch (Exception e) {
throw MakeException(_context, e);
}
}
[Documentation("setsockopt(level, optname[, value]) -> None\n\n"
+ "Set the value of a socket option. level is one of the SOL_* constants defined\n"
+ "in this module, and optname is one of the SO_* constants. value may be either\n"
+ "an integer or a string containing a binary structure. The caller is responsible\n"
+ "for properly encoding the byte string."
)]
public void setsockopt(int optionLevel, int optionName, object? value) {
SocketOptionLevel level = (SocketOptionLevel)Enum.ToObject(typeof(SocketOptionLevel), optionLevel);
if (!Enum.IsDefined(typeof(SocketOptionLevel), level)) {
throw MakeException(_context, new SocketException((int)SocketError.InvalidArgument));
}
SocketOptionName name = (SocketOptionName)Enum.ToObject(typeof(SocketOptionName), optionName);
if (!Enum.IsDefined(typeof(SocketOptionName), name)) {
throw MakeException(_context, new SocketException((int)SocketError.ProtocolOption));
}
try {
int intValue;
if (Converter.TryConvertToInt32(value, out intValue)) {
_socket.SetSocketOption(level, name, intValue);
return;
}
if (value is IBufferProtocol bp) {
using IPythonBuffer buf = bp.GetBuffer();
_socket.SetSocketOption(level, name, buf.AsReadOnlySpan().ToArray());
return;
}
throw PythonOps.TypeError("a bytes-like object is required, not '{0}'", PythonOps.GetPythonTypeName(value));
} catch (Exception e) {
throw MakeException(_context, e);
}
}
[Documentation("shutdown() -> None\n\n"
+ "Return the timeout duration in seconds for this socket as a float. If no\n"
+ "timeout is set, return None. For more details on timeouts and blocking, see the\n"
+ "Python socket module documentation."
)]
public void shutdown(int how) {
SocketShutdown howValue = (SocketShutdown)Enum.ToObject(typeof(SocketShutdown), how);
if (!Enum.IsDefined(typeof(SocketShutdown), howValue)) {
throw MakeException(_context, new SocketException((int)SocketError.InvalidArgument));
}
try {
_socket.Shutdown(howValue);
} catch (Exception e) {
throw MakeException(_context, e);
}
}
public int family => (int)_socket.AddressFamily;
public int type => (int)_socket.SocketType;
public int proto => (int)_socket.ProtocolType;
public int ioctl(BigInteger cmd, object? option) {
if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
throw PythonOps.ValueError(string.Format("invalid ioctl command {0}", cmd));
if (cmd == SIO_KEEPALIVE_VALS) {
if (!(option is PythonTuple))
throw PythonOps.TypeError("option must be 3-item sequence, not int");
var tOption = (PythonTuple)option;
if (tOption.Count != 3)
throw PythonOps.TypeError(string.Format("option must be sequence of length 3, not {0}", tOption.Count));
//(onoff, timeout, interval)
if ((!(tOption[0] is int)) && (!(tOption[1] is int)) && (!(tOption[2] is int)))
throw PythonOps.TypeError("option integer required");
int onoff = (int)tOption[0]!;
int timeout = (int)tOption[1]!;
int interval = (int)tOption[2]!;
int size = sizeof(UInt32);
byte[] inArray = new byte[size * 3];
Array.Copy(BitConverter.GetBytes(onoff), 0, inArray, 0, size);
Array.Copy(BitConverter.GetBytes(timeout), 0, inArray, size, size);
Array.Copy(BitConverter.GetBytes(size), 0, inArray, size * 2, size);
return _socket.IOControl((IOControlCode)(long)cmd, inArray, null);
} else if (cmd == SIO_RCVALL) {
if (!(option is int))
throw PythonOps.TypeError("option integer required");
return _socket.IOControl((IOControlCode)(long)cmd, BitConverter.GetBytes((int)option), null);
} else {
throw PythonOps.ValueError(string.Format("invalid ioctl command {0}", cmd));
}
}
public string __repr__(CodeContext context) {
try {
return $"<socket object, fd={fileno()}, family={family}, type={type}, proto={proto}>";
} catch {
return "<socket object, fd=-1, family=0, type=0, proto=0>";
}
}
/// <summary>
/// Return the internal System.Net.Sockets.Socket socket object associated with the given
/// handle (as returned by GetHandle()), or null if no corresponding socket exists. This is
/// primarily intended to be used by other modules (such as select) that implement
/// networking primitives. User code should not normally need to call this function.
/// </summary>
internal static Socket? HandleToSocket(Int64 handle) {
lock (_handleToSocket) {
if (_handleToSocket.TryGetValue(checked((IntPtr)handle), out WeakReference? weakref)) {
return weakref.Target as Socket;
}
}
return null;
}
#endregion
#region IWeakReferenceable Implementation
WeakRefTracker? IWeakReferenceable.GetWeakRef() {
return _weakRefTracker;
}
bool IWeakReferenceable.SetWeakRef(WeakRefTracker value) {
_weakRefTracker = value;
return true;
}
void IWeakReferenceable.SetFinalizer(WeakRefTracker value) {
_weakRefTracker = value;
}
#endregion
#region Private Implementation
/// <summary>
/// Create a Python socket object from an existing .NET socket object
/// (like one returned from Socket.Accept())
/// </summary>
private socket(CodeContext/*!*/ context, Socket socket) {
Initialize(context, socket);
}
/// <summary>
/// Perform initialization common to all constructors
/// </summary>
[System.Diagnostics.CodeAnalysis.MemberNotNull(nameof(_socket), nameof(_context))]
private void Initialize(CodeContext context, Socket socket) {
_socket = socket;
_context = context;
int? defaultTimeout = GetDefaultTimeout(context);
if (defaultTimeout == null) {
settimeout(null);
} else {
settimeout((double)defaultTimeout / MillisecondsPerSecond);
}
lock (_handleToSocket) {
_handleToSocket[socket.Handle] = new WeakReference(socket);
}
}
#endregion
}
#endregion
#region Fields
private const string AnyAddrToken = "";
private const string BroadcastAddrToken = "<broadcast>";
private const string LocalhostAddrToken = "";
private const int IPv4AddrBytes = 4;
private const int IPv6AddrBytes = 16;
private const double MillisecondsPerSecond = 1000.0;
#endregion
#region Public API
[Documentation("")]
public static PythonList getaddrinfo(
CodeContext/*!*/ context,
string? host,
object? port,
int family = (int)AddressFamily.Unspecified,
int socktype = 0,
int proto = (int)ProtocolType.IP,
int flags = (int)SocketFlags.None
) {
var numericPort = port switch {
null => 0,
int i => i,
BigInteger bi => (int)bi,
Extensible<BigInteger> bi => (int)bi.Value,
Bytes b => ParsePort(context, b.MakeString()),
string s => ParsePort(context, s),
ExtensibleString es => ParsePort(context, es.Value),
_ => throw MakeGaiException(context, EAI_NONAME),
};
static int ParsePort(CodeContext context, string port) {
if (int.TryParse(port, out var numericPort)) return numericPort;
try {
return getservbyname(context, port);
} catch {
throw MakeGaiException(context, EAI_NONAME);
}
}
if (socktype != 0) {
// we just use this to validate; socketType isn't actually used
System.Net.Sockets.SocketType socketType = (System.Net.Sockets.SocketType)Enum.ToObject(typeof(System.Net.Sockets.SocketType), socktype);
if (socketType == System.Net.Sockets.SocketType.Unknown || !Enum.IsDefined(typeof(System.Net.Sockets.SocketType), socketType)) {
throw MakeGaiException(context, EAI_BADHINTS);
}
}
AddressFamily addressFamily = (AddressFamily)Enum.ToObject(typeof(AddressFamily), family);
if (!Enum.IsDefined(typeof(AddressFamily), addressFamily)) {
throw MakeGaiException(context, EAI_FAMILY);
}
// Again, we just validate, but don't actually use protocolType
Enum.ToObject(typeof(ProtocolType), proto);
if (host == null)
host = "localhost";
IPAddress[] ips = HostToAddresses(context, host, addressFamily);
PythonList results = new PythonList();
foreach (IPAddress ip in ips) {
results.append(PythonTuple.MakeTuple(
(int)ip.AddressFamily,
socktype,
proto,
"",
EndPointToTuple(new IPEndPoint(ip, numericPort))
));
}
return results;