qnativesocketengine_p_p.h

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// Copyright (C) 2023 The Qt Company Ltd.
// Copyright (C) 2016 Intel Corporation.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QNATIVESOCKETENGINE_P_P_H
#define QNATIVESOCKETENGINE_P_P_H
 
//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
 
#include "private/qabstractsocketengine_p.h"
#include "private/qnativesocketengine_p.h"
 
#ifndef Q_OS_WIN
#  include <netinet/in.h>
#else
#  include <winsock2.h>
#  include <ws2tcpip.h>
#  include <mswsock.h>
#endif
 
QT_BEGIN_NAMESPACE
 
#ifdef Q_OS_WIN
 
// The following definitions are copied from the MinGW header mswsock.h which
// was placed in the public domain. The WSASendMsg and WSARecvMsg functions
// were introduced with Windows Vista, so some Win32 headers are lacking them.
// There are no known versions of Windows CE or Embedded that contain them.
#  ifndef WSAID_WSARECVMSG
typedef INT (WINAPI *LPFN_WSARECVMSG)(SOCKET s, LPWSAMSG lpMsg,
                                      LPDWORD lpdwNumberOfBytesRecvd,
                                      LPWSAOVERLAPPED lpOverlapped,
                                      LPWSAOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine);
#    define WSAID_WSARECVMSG {0xf689d7c8,0x6f1f,0x436b,{0x8a,0x53,0xe5,0x4f,0xe3,0x51,0xc3,0x22}}
#  endif // !WSAID_WSARECVMSG
#  ifndef WSAID_WSASENDMSG
typedef struct {
  LPWSAMSG lpMsg;
  DWORD dwFlags;
  LPDWORD lpNumberOfBytesSent;
  LPWSAOVERLAPPED lpOverlapped;
  LPWSAOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine;
} WSASENDMSG, *LPWSASENDMSG;
 
typedef INT (WSAAPI *LPFN_WSASENDMSG)(SOCKET s, LPWSAMSG lpMsg, DWORD dwFlags,
                                      LPDWORD lpNumberOfBytesSent,
                                      LPWSAOVERLAPPED lpOverlapped,
                                      LPWSAOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine);
 
#    define WSAID_WSASENDMSG {0xa441e712,0x754f,0x43ca,{0x84,0xa7,0x0d,0xee,0x44,0xcf,0x60,0x6d}}
#  endif // !WSAID_WSASENDMSG
#endif // Q_OS_WIN
 
union qt_sockaddr {
    sockaddr a;
    sockaddr_in a4;
    sockaddr_in6 a6;
};
 
class QSocketNotifier;
 
class QNativeSocketEnginePrivate : public QAbstractSocketEnginePrivate
{
    Q_DECLARE_PUBLIC(QNativeSocketEngine)
public:
    QNativeSocketEnginePrivate();
    ~QNativeSocketEnginePrivate();
 
    qintptr socketDescriptor;
 
    QSocketNotifier *readNotifier, *writeNotifier, *exceptNotifier;
 
#if defined(Q_OS_WIN)
    LPFN_WSASENDMSG sendmsg;
    LPFN_WSARECVMSG recvmsg;
#  endif
    enum ErrorString {
        NonBlockingInitFailedErrorString,
        BroadcastingInitFailedErrorString,
        NoIpV6ErrorString,
        RemoteHostClosedErrorString,
        TimeOutErrorString,
        ResourceErrorString,
        OperationUnsupportedErrorString,
        ProtocolUnsupportedErrorString,
        InvalidSocketErrorString,
        HostUnreachableErrorString,
        NetworkUnreachableErrorString,
        AccessErrorString,
        ConnectionTimeOutErrorString,
        ConnectionRefusedErrorString,
        AddressInuseErrorString,
        AddressNotAvailableErrorString,
        AddressProtectedErrorString,
        DatagramTooLargeErrorString,
        SendDatagramErrorString,
        ReceiveDatagramErrorString,
        WriteErrorString,
        ReadErrorString,
        PortInuseErrorString,
        NotSocketErrorString,
        InvalidProxyTypeString,
        TemporaryErrorString,
        NetworkDroppedConnectionErrorString,
        ConnectionResetErrorString,
 
        UnknownSocketErrorString = -1
    };
 
    void setError(QAbstractSocket::SocketError error, ErrorString errorString) const;
    QHostAddress adjustAddressProtocol(const QHostAddress &address) const;
 
    // native functions
    int option(QNativeSocketEngine::SocketOption option) const;
    bool setOption(QNativeSocketEngine::SocketOption option, int value);
 
    bool createNewSocket(QAbstractSocket::SocketType type, QAbstractSocket::NetworkLayerProtocol &protocol);
 
    bool nativeConnect(const QHostAddress &address, quint16 port);
    bool nativeBind(const QHostAddress &address, quint16 port);
    bool nativeListen(int backlog);
    qintptr nativeAccept();
#ifndef QT_NO_NETWORKINTERFACE
    bool nativeJoinMulticastGroup(const QHostAddress &groupAddress,
                                  const QNetworkInterface &iface);
    bool nativeLeaveMulticastGroup(const QHostAddress &groupAddress,
                                   const QNetworkInterface &iface);
    QNetworkInterface nativeMulticastInterface() const;
    bool nativeSetMulticastInterface(const QNetworkInterface &iface);
#endif
    qint64 nativeBytesAvailable() const;
 
    bool nativeHasPendingDatagrams() const;
    qint64 nativePendingDatagramSize() const;
    qint64 nativeReceiveDatagram(char *data, qint64 maxLength, QIpPacketHeader *header,
                                 QAbstractSocketEngine::PacketHeaderOptions options);
    qint64 nativeSendDatagram(const char *data, qint64 length, const QIpPacketHeader &header);
    qint64 nativeRead(char *data, qint64 maxLength);
    qint64 nativeWrite(const char *data, qint64 length);
    int nativeSelect(int timeout, bool selectForRead) const;
    int nativeSelect(int timeout, bool checkRead, bool checkWrite,
                     bool *selectForRead, bool *selectForWrite) const;
 
    void nativeClose();
 
    bool checkProxy(const QHostAddress &address);
    bool fetchConnectionParameters();
 
    void setPortAndAddress(quint16 port, const QHostAddress &address, qt_sockaddr *aa, QT_SOCKLEN_T *sockAddrSize)
    {
        switch (socketProtocol) {
        case QHostAddress::IPv6Protocol:
        case QHostAddress::AnyIPProtocol:
            // force to IPv6
            setSockaddr(&aa->a6, address, port);
            *sockAddrSize = sizeof(sockaddr_in6);
            return;
 
        case QHostAddress::IPv4Protocol:
            // force to IPv4
            setSockaddr(&aa->a4, address, port);
            *sockAddrSize = sizeof(sockaddr_in);
            return;
 
        case QHostAddress::UnknownNetworkLayerProtocol:
            // don't force
            break;
        }
        *sockAddrSize = setSockaddr(&aa->a, address, port);
    }
 
};
 
QT_END_NAMESPACE
 
#endif // QNATIVESOCKETENGINE_P_P_H