summaryrefslogtreecommitdiffstats
path: root/src/network/kernel/qnetworkinterface_win.cpp
blob: 238f9138465f15d6062c010d5388e10139415cdb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Copyright (C) 2015 Intel Corporation.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtNetwork module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#define WIN32_LEAN_AND_MEAN 1

#include "qnetworkinterface.h"
#include "qnetworkinterface_p.h"

#ifndef QT_NO_NETWORKINTERFACE

#include <qhostinfo.h>
#include <qhash.h>
#include <qurl.h>

// Since we need to include winsock2.h, we need to define WIN32_LEAN_AND_MEAN
// (above) so windows.h won't include winsock.h.
// In addition, we need to include winsock2.h before iphlpapi.h and we need
// to include ws2ipdef.h to work around an MinGW-w64 bug
// (http://sourceforge.net/p/mingw-w64/mailman/message/32935366/)
#include <winsock2.h>
#include <ws2ipdef.h>
#include <iphlpapi.h>
#include <ws2tcpip.h>

#include <qt_windows.h>

QT_BEGIN_NAMESPACE

typedef NETIO_STATUS (WINAPI *PtrConvertInterfaceIndexToLuid)(NET_IFINDEX, PNET_LUID);
typedef NETIO_STATUS (WINAPI *PtrConvertInterfaceLuidToName)(const NET_LUID *, PWSTR, SIZE_T);
typedef NETIO_STATUS (WINAPI *PtrConvertInterfaceLuidToIndex)(const NET_LUID *, PNET_IFINDEX);
typedef NETIO_STATUS (WINAPI *PtrConvertInterfaceNameToLuid)(const WCHAR *, PNET_LUID);
static PtrConvertInterfaceIndexToLuid ptrConvertInterfaceIndexToLuid = 0;
static PtrConvertInterfaceLuidToName ptrConvertInterfaceLuidToName = 0;
static PtrConvertInterfaceLuidToIndex ptrConvertInterfaceLuidToIndex = 0;
static PtrConvertInterfaceNameToLuid ptrConvertInterfaceNameToLuid = 0;

static void resolveLibs()
{
    // try to find the functions we need from Iphlpapi.dll
    static bool done = false;

    if (!done) {
        HINSTANCE iphlpapiHnd = GetModuleHandle(L"iphlpapi");
        Q_ASSERT(iphlpapiHnd);

#if defined(Q_OS_WINCE)
        // since Windows Embedded Compact 7
        ptrConvertInterfaceIndexToLuid = (PtrConvertInterfaceIndexToLuid)GetProcAddress(iphlpapiHnd, L"ConvertInterfaceIndexToLuid");
        ptrConvertInterfaceLuidToName = (PtrConvertInterfaceLuidToName)GetProcAddress(iphlpapiHnd, L"ConvertInterfaceLuidToNameW");
        ptrConvertInterfaceLuidToIndex = (PtrConvertInterfaceLuidToIndex)GetProcAddress(iphlpapiHnd, L"ConvertInterfaceLuidToIndex");
        ptrConvertInterfaceNameToLuid = (PtrConvertInterfaceNameToLuid)GetProcAddress(iphlpapiHnd, L"ConvertInterfaceNameToLuidW");
#else
        // since Windows Vista
        ptrConvertInterfaceIndexToLuid = (PtrConvertInterfaceIndexToLuid)GetProcAddress(iphlpapiHnd, "ConvertInterfaceIndexToLuid");
        ptrConvertInterfaceLuidToName = (PtrConvertInterfaceLuidToName)GetProcAddress(iphlpapiHnd, "ConvertInterfaceLuidToNameW");
        ptrConvertInterfaceLuidToIndex = (PtrConvertInterfaceLuidToIndex)GetProcAddress(iphlpapiHnd, "ConvertInterfaceLuidToIndex");
        ptrConvertInterfaceNameToLuid = (PtrConvertInterfaceNameToLuid)GetProcAddress(iphlpapiHnd, "ConvertInterfaceNameToLuidW");
#endif
        done = true;
    }
}

static QHostAddress addressFromSockaddr(sockaddr *sa)
{
    QHostAddress address;
    if (!sa)
        return address;

    if (sa->sa_family == AF_INET)
        address.setAddress(htonl(((sockaddr_in *)sa)->sin_addr.s_addr));
    else if (sa->sa_family == AF_INET6) {
        address.setAddress(((sockaddr_in6 *)sa)->sin6_addr.s6_addr);
        int scope = ((sockaddr_in6 *)sa)->sin6_scope_id;
        if (scope)
            address.setScopeId(QNetworkInterfaceManager::interfaceNameFromIndex(scope));
    } else
        qWarning("Got unknown socket family %d", sa->sa_family);
    return address;

}

uint QNetworkInterfaceManager::interfaceIndexFromName(const QString &name)
{
    resolveLibs();
    if (!ptrConvertInterfaceNameToLuid || !ptrConvertInterfaceLuidToIndex)
        return 0;

    NET_IFINDEX id;
    NET_LUID luid;
    if (ptrConvertInterfaceNameToLuid(reinterpret_cast<const wchar_t *>(name.constData()), &luid) == NO_ERROR
            && ptrConvertInterfaceLuidToIndex(&luid, &id) == NO_ERROR)
        return uint(id);
    return 0;
}

QString QNetworkInterfaceManager::interfaceNameFromIndex(uint index)
{
    resolveLibs();
    if (ptrConvertInterfaceIndexToLuid && ptrConvertInterfaceLuidToName) {
        NET_LUID luid;
        if (ptrConvertInterfaceIndexToLuid(index, &luid) == NO_ERROR) {
            WCHAR buf[IF_MAX_STRING_SIZE + 1];
            if (ptrConvertInterfaceLuidToName(&luid, buf, sizeof(buf)/sizeof(buf[0])) == NO_ERROR)
                return QString::fromWCharArray(buf);
        }
    }

    return QString::number(index);
}

static QHash<QHostAddress, QHostAddress> ipv4Netmasks()
{
    //Retrieve all the IPV4 addresses & netmasks
    IP_ADAPTER_INFO staticBuf[2]; // 2 is arbitrary
    PIP_ADAPTER_INFO pAdapter = staticBuf;
    ULONG bufSize = sizeof staticBuf;
    QHash<QHostAddress, QHostAddress> ipv4netmasks;

    DWORD retval = GetAdaptersInfo(pAdapter, &bufSize);
    if (retval == ERROR_BUFFER_OVERFLOW) {
        // need more memory
        pAdapter = (IP_ADAPTER_INFO *)malloc(bufSize);
        if (!pAdapter)
            return ipv4netmasks;
        // try again
        if (GetAdaptersInfo(pAdapter, &bufSize) != ERROR_SUCCESS) {
            free(pAdapter);
            return ipv4netmasks;
        }
    } else if (retval != ERROR_SUCCESS) {
        // error
        return ipv4netmasks;
    }

    // iterate over the list and add the entries to our listing
    for (PIP_ADAPTER_INFO ptr = pAdapter; ptr; ptr = ptr->Next) {
        for (PIP_ADDR_STRING addr = &ptr->IpAddressList; addr; addr = addr->Next) {
            QHostAddress address(QLatin1String(addr->IpAddress.String));
            QHostAddress mask(QLatin1String(addr->IpMask.String));
            ipv4netmasks[address] = mask;
        }
    }
    if (pAdapter != staticBuf)
        free(pAdapter);

    return ipv4netmasks;

}

static QList<QNetworkInterfacePrivate *> interfaceListingWinXP()
{
    QList<QNetworkInterfacePrivate *> interfaces;
    IP_ADAPTER_ADDRESSES staticBuf[2]; // 2 is arbitrary
    PIP_ADAPTER_ADDRESSES pAdapter = staticBuf;
    ULONG bufSize = sizeof staticBuf;

    const QHash<QHostAddress, QHostAddress> &ipv4netmasks = ipv4Netmasks();
    ULONG flags = GAA_FLAG_INCLUDE_PREFIX |
                  GAA_FLAG_SKIP_DNS_SERVER |
                  GAA_FLAG_SKIP_MULTICAST;
    ULONG retval = GetAdaptersAddresses(AF_UNSPEC, flags, NULL, pAdapter, &bufSize);
    if (retval == ERROR_BUFFER_OVERFLOW) {
        // need more memory
        pAdapter = (IP_ADAPTER_ADDRESSES *)malloc(bufSize);
        if (!pAdapter)
            return interfaces;
        // try again
        if (GetAdaptersAddresses(AF_UNSPEC, flags, NULL, pAdapter, &bufSize) != ERROR_SUCCESS) {
            free(pAdapter);
            return interfaces;
        }
    } else if (retval != ERROR_SUCCESS) {
        // error
        return interfaces;
    }

    // iterate over the list and add the entries to our listing
    for (PIP_ADAPTER_ADDRESSES ptr = pAdapter; ptr; ptr = ptr->Next) {
        QNetworkInterfacePrivate *iface = new QNetworkInterfacePrivate;
        interfaces << iface;

        iface->index = 0;
        if (ptr->Length >= offsetof(IP_ADAPTER_ADDRESSES, Ipv6IfIndex) && ptr->Ipv6IfIndex != 0)
            iface->index = ptr->Ipv6IfIndex;
        else if (ptr->IfIndex != 0)
            iface->index = ptr->IfIndex;

        iface->flags = QNetworkInterface::CanBroadcast;
        if (ptr->OperStatus == IfOperStatusUp)
            iface->flags |= QNetworkInterface::IsUp | QNetworkInterface::IsRunning;
        if ((ptr->Flags & IP_ADAPTER_NO_MULTICAST) == 0)
            iface->flags |= QNetworkInterface::CanMulticast;
        if (ptr->IfType == IF_TYPE_PPP)
            iface->flags |= QNetworkInterface::IsPointToPoint;

        if (ptrConvertInterfaceLuidToName && ptr->Length >= offsetof(IP_ADAPTER_ADDRESSES, Luid)) {
            // use ConvertInterfaceLuidToName because that returns a friendlier name, though not
            // as friendly as FriendlyName below
            WCHAR buf[IF_MAX_STRING_SIZE + 1];
            if (ptrConvertInterfaceLuidToName(&ptr->Luid, buf, sizeof(buf)/sizeof(buf[0])) == NO_ERROR)
                iface->name = QString::fromWCharArray(buf);
        }
        if (iface->name.isEmpty())
            iface->name = QString::fromLocal8Bit(ptr->AdapterName);

        iface->friendlyName = QString::fromWCharArray(ptr->FriendlyName);
        if (ptr->PhysicalAddressLength)
            iface->hardwareAddress = iface->makeHwAddress(ptr->PhysicalAddressLength,
                                                          ptr->PhysicalAddress);
        else
            // loopback if it has no address
            iface->flags |= QNetworkInterface::IsLoopBack;

        // The GetAdaptersAddresses call has an interesting semantic:
        // It can return a number N of addresses and a number M of prefixes.
        // But if you have IPv6 addresses, generally N > M.
        // I cannot find a way to relate the Address to the Prefix, aside from stopping
        // the iteration at the last Prefix entry and assume that it applies to all addresses
        // from that point on.
        PIP_ADAPTER_PREFIX pprefix = 0;
        if (ptr->Length >= offsetof(IP_ADAPTER_ADDRESSES, FirstPrefix))
            pprefix = ptr->FirstPrefix;
        for (PIP_ADAPTER_UNICAST_ADDRESS addr = ptr->FirstUnicastAddress; addr; addr = addr->Next) {
            QNetworkAddressEntry entry;
            entry.setIp(addressFromSockaddr(addr->Address.lpSockaddr));
            if (pprefix) {
                if (entry.ip().protocol() == QAbstractSocket::IPv4Protocol) {
                    entry.setNetmask(ipv4netmasks[entry.ip()]);

                    // broadcast address is set on postProcess()
                } else { //IPV6
                    entry.setPrefixLength(pprefix->PrefixLength);
                }
                pprefix = pprefix->Next ? pprefix->Next : pprefix;
            }
            iface->addressEntries << entry;
        }
    }

    if (pAdapter != staticBuf)
        free(pAdapter);

    return interfaces;
}

QList<QNetworkInterfacePrivate *> QNetworkInterfaceManager::scan()
{
    resolveLibs();
    return interfaceListingWinXP();
}

QString QHostInfo::localDomainName()
{
    resolveLibs();

    FIXED_INFO info, *pinfo;
    ULONG bufSize = sizeof info;
    pinfo = &info;
    if (GetNetworkParams(pinfo, &bufSize) == ERROR_BUFFER_OVERFLOW) {
        pinfo = (FIXED_INFO *)malloc(bufSize);
        if (!pinfo)
            return QString();
        // try again
        if (GetNetworkParams(pinfo, &bufSize) != ERROR_SUCCESS) {
            free(pinfo);
            return QString();   // error
        }
    }

    QString domainName = QUrl::fromAce(pinfo->DomainName);

    if (pinfo != &info)
        free(pinfo);

    return domainName;
}

QT_END_NAMESPACE

#endif // QT_NO_NETWORKINTERFACE