summaryrefslogtreecommitdiffstats
path: root/src/network/kernel/qhostinfo_win.cpp
blob: 472bc4b169518643f54148a38b34e0329f278765 (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
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the QtNetwork module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/

#if defined Q_CC_MSVC && _MSC_VER <=1300
//VC.net 2002 support for templates doesn't match some PSDK requirements
#define _WSPIAPI_COUNTOF(_Array) (sizeof(_Array) / sizeof(_Array[0]))
#endif

#include <winsock2.h>

#include "qhostinfo_p.h"
#include "private/qnativesocketengine_p.h"
#include <ws2tcpip.h>
#include <qlibrary.h>
#include <qtimer.h>
#include <qmutex.h>
#include <private/qmutexpool_p.h>

QT_BEGIN_NAMESPACE

//#define QHOSTINFO_DEBUG

// Older SDKs do not include the addrinfo struct declaration, so we
// include a copy of it here.
struct qt_addrinfo
{
    int ai_flags;
    int ai_family;
    int ai_socktype;
    int ai_protocol;
    size_t ai_addrlen;
    char *ai_canonname;
    sockaddr *ai_addr;
    qt_addrinfo *ai_next;
};

//###
#define QT_SOCKLEN_T int
#ifndef NI_MAXHOST // already defined to 1025 in ws2tcpip.h?
#define NI_MAXHOST 1024
#endif

typedef int (__stdcall *getnameinfoProto)(const sockaddr *, QT_SOCKLEN_T, const char *, DWORD, const char *, DWORD, int);
typedef int (__stdcall *getaddrinfoProto)(const char *, const char *, const qt_addrinfo *, qt_addrinfo **);
typedef int (__stdcall *freeaddrinfoProto)(qt_addrinfo *);
static getnameinfoProto local_getnameinfo = 0;
static getaddrinfoProto local_getaddrinfo = 0;
static freeaddrinfoProto local_freeaddrinfo = 0;

static void resolveLibrary()
{
    // Attempt to resolve getaddrinfo(); without it we'll have to fall
    // back to gethostbyname(), which has no IPv6 support.
#if !defined(Q_OS_WINCE)
    local_getaddrinfo = (getaddrinfoProto) QLibrary::resolve(QLatin1String("ws2_32.dll"), "getaddrinfo");
    local_freeaddrinfo = (freeaddrinfoProto) QLibrary::resolve(QLatin1String("ws2_32.dll"), "freeaddrinfo");
    local_getnameinfo = (getnameinfoProto) QLibrary::resolve(QLatin1String("ws2_32.dll"), "getnameinfo");
#else
    local_getaddrinfo = (getaddrinfoProto) QLibrary::resolve(QLatin1String("ws2.dll"), "getaddrinfo");
    local_freeaddrinfo = (freeaddrinfoProto) QLibrary::resolve(QLatin1String("ws2.dll"), "freeaddrinfo");
    local_getnameinfo = (getnameinfoProto) QLibrary::resolve(QLatin1String("ws2.dll"), "getnameinfo");
#endif
}

#if defined(Q_OS_WINCE)
#include <qmutex.h>
QMutex qPrivCEMutex;
#endif
/*
    Performs a blocking call to gethostbyname or getaddrinfo, stores
    the results in a QHostInfo structure and emits the
    resultsReady() signal.
*/
QHostInfo QHostInfoAgent::fromName(const QString &hostName)
{
#if defined(Q_OS_WINCE)
    QMutexLocker locker(&qPrivCEMutex);
#endif
    QWindowsSockInit winSock;

    // Load res_init on demand.
    static volatile bool triedResolve = false;
    if (!triedResolve) {
#ifndef QT_NO_THREAD
        QMutexLocker locker(QMutexPool::globalInstanceGet(&local_getaddrinfo));
#endif
        if (!triedResolve) {
            resolveLibrary();
            triedResolve = true;
        }
    }

    QHostInfo results;
    results.setHostName(hostName);

#if defined(QHOSTINFO_DEBUG)
    qDebug("QHostInfoAgent::fromName(%p): looking up \"%s\" (IPv6 support is %s)",
           this, hostName.toLatin1().constData(),
           (local_getaddrinfo && local_freeaddrinfo) ? "enabled" : "disabled");
#endif

    QHostAddress address;
    if (address.setAddress(hostName)) {
        // Reverse lookup
        if (local_getnameinfo) {
            sockaddr_in sa4;
            qt_sockaddr_in6 sa6;
            sockaddr *sa;
            QT_SOCKLEN_T saSize;
            if (address.protocol() == QAbstractSocket::IPv4Protocol) {
                sa = (sockaddr *)&sa4;
                saSize = sizeof(sa4);
                memset(&sa4, 0, sizeof(sa4));
                sa4.sin_family = AF_INET;
                sa4.sin_addr.s_addr = htonl(address.toIPv4Address());
            } else {
                sa = (sockaddr *)&sa6;
                saSize = sizeof(sa6);
                memset(&sa6, 0, sizeof(sa6));
                sa6.sin6_family = AF_INET6;
                memcpy(sa6.sin6_addr.qt_s6_addr, address.toIPv6Address().c, sizeof(sa6.sin6_addr.qt_s6_addr));
            }

            char hbuf[NI_MAXHOST];
            if (local_getnameinfo(sa, saSize, hbuf, sizeof(hbuf), 0, 0, 0) != 0) {
                results.setError(QHostInfo::HostNotFound);
                results.setErrorString(tr("Host not found"));
                return results;
            }
            results.setHostName(QString::fromLatin1(hbuf));
        } else {
            unsigned long addr = inet_addr(hostName.toLatin1().constData());
            struct hostent *ent = gethostbyaddr((const char*)&addr, sizeof(addr), AF_INET);
            if (!ent) {
                results.setError(QHostInfo::HostNotFound);
                results.setErrorString(tr("Host not found"));
                return results;
            }
            results.setHostName(QString::fromLatin1(ent->h_name));
        }
    }

    if (local_getaddrinfo && local_freeaddrinfo) {
        // Call getaddrinfo, and place all IPv4 addresses at the start
        // and the IPv6 addresses at the end of the address list in
        // results.
        qt_addrinfo *res;
        int err = local_getaddrinfo(hostName.toLatin1().constData(), 0, 0, &res);
        if (err == 0) {
            QList<QHostAddress> addresses;
            for (qt_addrinfo *p = res; p != 0; p = p->ai_next) {
                switch (p->ai_family) {
                case AF_INET: {
                    QHostAddress addr;
                    addr.setAddress(ntohl(((sockaddr_in *) p->ai_addr)->sin_addr.s_addr));
                    if (!addresses.contains(addr))
                        addresses.append(addr);
                }
                    break;
                case AF_INET6: {
                    QHostAddress addr;
                    addr.setAddress(((qt_sockaddr_in6 *) p->ai_addr)->sin6_addr.qt_s6_addr);
                    if (!addresses.contains(addr))
                        addresses.append(addr);
                }
                    break;
                default:
                    results.setError(QHostInfo::UnknownError);
                    results.setErrorString(tr("Unknown address type"));
                }
            }
            results.setAddresses(addresses);
            local_freeaddrinfo(res);
        } else if (WSAGetLastError() == WSAHOST_NOT_FOUND || WSAGetLastError() == WSANO_DATA) {
            results.setError(QHostInfo::HostNotFound);
            results.setErrorString(tr("Host not found"));
        } else {
            results.setError(QHostInfo::UnknownError);
            results.setErrorString(tr("Unknown error"));
        }
    } else {
        // Fall back to gethostbyname, which only supports IPv4.
        hostent *ent = gethostbyname(hostName.toLatin1().constData());
        if (ent) {
            char **p;
            QList<QHostAddress> addresses;
            switch (ent->h_addrtype) {
            case AF_INET:
                for (p = ent->h_addr_list; *p != 0; p++) {
                    long *ip4Addr = (long *) *p;
                    QHostAddress temp;
                    temp.setAddress(ntohl(*ip4Addr));
                    addresses << temp;
                }
                break;
            default:
                results.setError(QHostInfo::UnknownError);
                results.setErrorString(tr("Unknown address type"));
                break;
            }
            results.setAddresses(addresses);
        } else if (WSAGetLastError() == 11001) {
            results.setErrorString(tr("Host not found"));
            results.setError(QHostInfo::HostNotFound);
        } else {
            results.setErrorString(tr("Unknown error"));
            results.setError(QHostInfo::UnknownError);
        }
    }

#if defined(QHOSTINFO_DEBUG)
    if (results.error() != QHostInfo::NoError) {
        qDebug("QHostInfoAgent::run(%p): error (%s)",
               this, results.errorString().toLatin1().constData());
    } else {
        QString tmp;
        QList<QHostAddress> addresses = results.addresses();
        for (int i = 0; i < addresses.count(); ++i) {
            if (i != 0) tmp += ", ";
            tmp += addresses.at(i).toString();
        }
        qDebug("QHostInfoAgent::run(%p): found %i entries: {%s}",
               this, addresses.count(), tmp.toLatin1().constData());
    }
#endif
    return results;
}

QString QHostInfo::localHostName()
{
    QWindowsSockInit winSock;

    char hostName[512];
    if (gethostname(hostName, sizeof(hostName)) == -1)
        return QString();
    hostName[sizeof(hostName) - 1] = '\0';
    return QString::fromLocal8Bit(hostName);
}

// QString QHostInfo::localDomainName() defined in qnetworkinterface_win.cpp

QT_END_NAMESPACE