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
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <windows.h>
#include <winnetwk.h>
#include "mozilla/FileUtilsWin.h"
#include "nsCRTGlue.h"
#include "gtest/gtest.h"
class DriveMapping {
public:
explicit DriveMapping(const nsAString& aRemoteUNCPath);
~DriveMapping();
bool Init();
bool ChangeDriveLetter();
wchar_t GetDriveLetter() { return mDriveLetter; }
private:
bool DoMapping();
void Disconnect(wchar_t aDriveLetter);
wchar_t mDriveLetter;
nsString mRemoteUNCPath;
};
DriveMapping::DriveMapping(const nsAString& aRemoteUNCPath)
: mDriveLetter(0), mRemoteUNCPath(aRemoteUNCPath) {}
bool DriveMapping::Init() {
if (mDriveLetter) {
return false;
}
return DoMapping();
}
bool DriveMapping::DoMapping() {
wchar_t drvTemplate[] = L" :";
NETRESOURCEW netRes = {0};
netRes.dwType = RESOURCETYPE_DISK;
netRes.lpLocalName = drvTemplate;
netRes.lpRemoteName =
reinterpret_cast<wchar_t*>(mRemoteUNCPath.BeginWriting());
wchar_t driveLetter = L'D';
DWORD result = NO_ERROR;
do {
drvTemplate[0] = driveLetter;
result = WNetAddConnection2W(&netRes, nullptr, nullptr, CONNECT_TEMPORARY);
} while (result == ERROR_ALREADY_ASSIGNED && ++driveLetter <= L'Z');
if (result != NO_ERROR) {
return false;
}
mDriveLetter = driveLetter;
return true;
}
bool DriveMapping::ChangeDriveLetter() {
wchar_t prevDriveLetter = mDriveLetter;
bool result = DoMapping();
MOZ_RELEASE_ASSERT(mDriveLetter != prevDriveLetter);
if (result && prevDriveLetter) {
Disconnect(prevDriveLetter);
}
return result;
}
void DriveMapping::Disconnect(wchar_t aDriveLetter) {
wchar_t drvTemplate[] = {aDriveLetter, L':', L'\0'};
DWORD result = WNetCancelConnection2W(drvTemplate, 0, TRUE);
MOZ_RELEASE_ASSERT(result == NO_ERROR);
}
DriveMapping::~DriveMapping() {
if (mDriveLetter) {
Disconnect(mDriveLetter);
}
}
bool DriveToNtPath(const wchar_t aDriveLetter, nsAString& aNtPath) {
const wchar_t drvTpl[] = {aDriveLetter, L':', L'\0'};
aNtPath.SetLength(MAX_PATH);
DWORD pathLen;
while (true) {
pathLen = QueryDosDeviceW(
drvTpl, reinterpret_cast<wchar_t*>(aNtPath.BeginWriting()),
aNtPath.Length());
if (pathLen || GetLastError() != ERROR_INSUFFICIENT_BUFFER) {
break;
}
aNtPath.SetLength(aNtPath.Length() * 2);
}
if (!pathLen) {
return false;
}
// aNtPath contains embedded NULLs, so we need to figure out the real length
// via wcslen.
aNtPath.SetLength(NS_strlen(aNtPath.BeginReading()));
return true;
}
bool TestNtPathToDosPath(const wchar_t* aNtPath,
const wchar_t* aExpectedDosPath) {
nsAutoString output;
bool result = mozilla::NtPathToDosPath(nsDependentString(aNtPath), output);
return result && output == reinterpret_cast<const nsAString::char_type*>(
aExpectedDosPath);
}
TEST(NtPathToDosPath, Tests)
{
nsAutoString cDrive;
ASSERT_TRUE(DriveToNtPath(L'C', cDrive));
// empty string
EXPECT_TRUE(TestNtPathToDosPath(L"", L""));
// non-existent device, must fail
EXPECT_FALSE(
TestNtPathToDosPath(L"\\Device\\ThisDeviceDoesNotExist\\Foo", nullptr));
// base case
nsAutoString testPath(cDrive);
testPath.Append(L"\\Program Files");
EXPECT_TRUE(TestNtPathToDosPath(testPath.get(), L"C:\\Program Files"));
// short filename
nsAutoString ntShortName(cDrive);
ntShortName.Append(L"\\progra~1");
EXPECT_TRUE(TestNtPathToDosPath(ntShortName.get(), L"C:\\Program Files"));
// drive letters as symbolic links (NtCreateFile uses these)
EXPECT_TRUE(TestNtPathToDosPath(L"\\??\\C:\\Foo", L"C:\\Foo"));
// other symbolic links (should fail)
EXPECT_FALSE(TestNtPathToDosPath(L"\\??\\MountPointManager", nullptr));
// socket (should fail)
EXPECT_FALSE(TestNtPathToDosPath(L"\\Device\\Afd\\Endpoint", nullptr));
// UNC path (using MUP)
EXPECT_TRUE(TestNtPathToDosPath(L"\\Device\\Mup\\127.0.0.1\\C$",
L"\\\\127.0.0.1\\C$"));
// UNC path (using LanmanRedirector)
EXPECT_TRUE(TestNtPathToDosPath(L"\\Device\\LanmanRedirector\\127.0.0.1\\C$",
L"\\\\127.0.0.1\\C$"));
DriveMapping drvMapping(u"\\\\127.0.0.1\\C$"_ns);
// Only run these tests if we were able to map; some machines don't have perms
if (drvMapping.Init()) {
wchar_t expected[] = L" :\\";
expected[0] = drvMapping.GetDriveLetter();
nsAutoString networkPath;
ASSERT_TRUE(DriveToNtPath(drvMapping.GetDriveLetter(), networkPath));
networkPath += u"\\";
EXPECT_TRUE(TestNtPathToDosPath(networkPath.get(), expected));
// NtPathToDosPath must correctly handle paths whose drive letter mapping
// has changed. We need to test this because the APIs called by
// NtPathToDosPath return different info if this has happened.
ASSERT_TRUE(drvMapping.ChangeDriveLetter());
expected[0] = drvMapping.GetDriveLetter();
ASSERT_TRUE(DriveToNtPath(drvMapping.GetDriveLetter(), networkPath));
networkPath += u"\\";
EXPECT_TRUE(TestNtPathToDosPath(networkPath.get(), expected));
}
}
|
