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
|
/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
/* vim: set ts=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 "DaemonSocketConnector.h"
#include <fcntl.h>
#include <limits.h>
#include <stddef.h>
#include <string.h>
#include <sys/un.h>
#include "nsISupportsImpl.h" // for MOZ_COUNT_CTOR, MOZ_COUNT_DTOR
#include "prrng.h"
#ifdef CHROMIUM_LOG
#undef CHROMIUM_LOG
#endif
#if defined(MOZ_WIDGET_GONK)
#include <android/log.h>
#define CHROMIUM_LOG(args...) __android_log_print(ANDROID_LOG_INFO, "I/O", args);
#else
#include <stdio.h>
#define IODEBUG true
#define CHROMIUM_LOG(args...) if (IODEBUG) printf(args);
#endif
namespace mozilla {
namespace ipc {
nsresult
DaemonSocketConnector::CreateRandomAddressString(
const nsACString& aPrefix, unsigned long aPostfixLength,
nsACString& aAddress)
{
static const char sHexChar[16] = {
[0x0] = '0', [0x1] = '1', [0x2] = '2', [0x3] = '3',
[0x4] = '4', [0x5] = '5', [0x6] = '6', [0x7] = '7',
[0x8] = '8', [0x9] = '9', [0xa] = 'a', [0xb] = 'b',
[0xc] = 'c', [0xd] = 'd', [0xe] = 'e', [0xf] = 'f'
};
unsigned short seed[3];
if (NS_WARN_IF(!PR_GetRandomNoise(seed, sizeof(seed)))) {
return NS_ERROR_NOT_IMPLEMENTED;
}
aAddress = aPrefix;
aAddress.Append('-');
while (aPostfixLength) {
// Android doesn't provide rand_r, so we use nrand48 here,
// even though it's deprecated.
long value = nrand48(seed);
size_t bits = sizeof(value) * CHAR_BIT;
while ((bits > 4) && aPostfixLength) {
aAddress.Append(sHexChar[value&0xf]);
bits -= 4;
value >>= 4;
--aPostfixLength;
}
}
return NS_OK;
}
DaemonSocketConnector::DaemonSocketConnector(const nsACString& aSocketName)
: mSocketName(aSocketName)
{
MOZ_COUNT_CTOR_INHERITED(DaemonSocketConnector, UnixSocketConnector);
}
DaemonSocketConnector::~DaemonSocketConnector()
{
MOZ_COUNT_CTOR_INHERITED(DaemonSocketConnector, UnixSocketConnector);
}
nsresult
DaemonSocketConnector::CreateSocket(int& aFd) const
{
aFd = socket(AF_UNIX, SOCK_SEQPACKET, 0);
if (aFd < 0) {
CHROMIUM_LOG("Could not open daemon socket!");
return NS_ERROR_FAILURE;
}
return NS_OK;
}
nsresult
DaemonSocketConnector::SetSocketFlags(int aFd) const
{
static const int sReuseAddress = 1;
// Set close-on-exec bit.
int flags = TEMP_FAILURE_RETRY(fcntl(aFd, F_GETFD));
if (flags < 0) {
return NS_ERROR_FAILURE;
}
flags |= FD_CLOEXEC;
int res = TEMP_FAILURE_RETRY(fcntl(aFd, F_SETFD, flags));
if (res < 0) {
return NS_ERROR_FAILURE;
}
// Set non-blocking status flag.
flags = TEMP_FAILURE_RETRY(fcntl(aFd, F_GETFL));
if (flags < 0) {
return NS_ERROR_FAILURE;
}
flags |= O_NONBLOCK;
res = TEMP_FAILURE_RETRY(fcntl(aFd, F_SETFL, flags));
if (res < 0) {
return NS_ERROR_FAILURE;
}
// Set socket addr to be reused even if kernel is still waiting to close.
res = setsockopt(aFd, SOL_SOCKET, SO_REUSEADDR, &sReuseAddress,
sizeof(sReuseAddress));
if (res < 0) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
nsresult
DaemonSocketConnector::CreateAddress(struct sockaddr& aAddress,
socklen_t& aAddressLength) const
{
static const size_t sNameOffset = 1;
struct sockaddr_un* address =
reinterpret_cast<struct sockaddr_un*>(&aAddress);
size_t namesiz = mSocketName.Length() + 1; // include trailing '\0'
if (NS_WARN_IF((sNameOffset + namesiz) > sizeof(address->sun_path))) {
return NS_ERROR_FAILURE;
}
address->sun_family = AF_UNIX;
memset(address->sun_path, '\0', sNameOffset); // abstract socket
memcpy(address->sun_path + sNameOffset, mSocketName.get(), namesiz);
aAddressLength =
offsetof(struct sockaddr_un, sun_path) + sNameOffset + namesiz;
return NS_OK;
}
// |UnixSocketConnector|
nsresult
DaemonSocketConnector::ConvertAddressToString(
const struct sockaddr& aAddress, socklen_t aAddressLength,
nsACString& aAddressString)
{
MOZ_ASSERT(aAddress.sa_family == AF_UNIX);
const struct sockaddr_un* un =
reinterpret_cast<const struct sockaddr_un*>(&aAddress);
size_t len = aAddressLength - offsetof(struct sockaddr_un, sun_path);
aAddressString.Assign(un->sun_path, len);
return NS_OK;
}
nsresult
DaemonSocketConnector::CreateListenSocket(struct sockaddr* aAddress,
socklen_t* aAddressLength,
int& aListenFd)
{
ScopedClose fd;
nsresult rv = CreateSocket(fd.rwget());
if (NS_FAILED(rv)) {
return rv;
}
rv = SetSocketFlags(fd);
if (NS_FAILED(rv)) {
return rv;
}
if (aAddress && aAddressLength) {
rv = CreateAddress(*aAddress, *aAddressLength);
if (NS_FAILED(rv)) {
return rv;
}
}
aListenFd = fd.forget();
return NS_OK;
}
nsresult
DaemonSocketConnector::AcceptStreamSocket(int aListenFd,
struct sockaddr* aAddress,
socklen_t* aAddressLength,
int& aStreamFd)
{
ScopedClose fd(
TEMP_FAILURE_RETRY(accept(aListenFd, aAddress, aAddressLength)));
if (fd < 0) {
CHROMIUM_LOG("Cannot accept file descriptor!");
return NS_ERROR_FAILURE;
}
nsresult rv = SetSocketFlags(fd);
if (NS_FAILED(rv)) {
return rv;
}
aStreamFd = fd.forget();
return NS_OK;
}
nsresult
DaemonSocketConnector::CreateStreamSocket(struct sockaddr* aAddress,
socklen_t* aAddressLength,
int& aStreamFd)
{
MOZ_CRASH("|DaemonSocketConnector| does not support "
"creating stream sockets.");
return NS_ERROR_ABORT;
}
nsresult
DaemonSocketConnector::Duplicate(UnixSocketConnector*& aConnector)
{
aConnector = new DaemonSocketConnector(*this);
return NS_OK;
}
} // namespace ipc
} // namespace mozilla
|
