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
|
// Copyright 2018 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/statfs.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include "gtest/gtest.h"
#include "test/syscalls/linux/socket_test_util.h"
#include "test/util/file_descriptor.h"
#include "test/util/temp_umask.h"
#include "test/util/test_util.h"
namespace gvisor {
namespace testing {
// From linux/magic.h, but we can't depend on linux headers here.
#define SOCKFS_MAGIC 0x534F434B
TEST(SocketTest, UnixSocketPairProtocol) {
int socks[2];
ASSERT_THAT(socketpair(AF_UNIX, SOCK_STREAM, PF_UNIX, socks),
SyscallSucceeds());
close(socks[0]);
close(socks[1]);
}
TEST(SocketTest, ProtocolUnix) {
struct {
int domain, type, protocol;
} tests[] = {
{AF_UNIX, SOCK_STREAM, PF_UNIX},
{AF_UNIX, SOCK_SEQPACKET, PF_UNIX},
{AF_UNIX, SOCK_DGRAM, PF_UNIX},
};
for (long unsigned int i = 0; i < ABSL_ARRAYSIZE(tests); i++) {
ASSERT_NO_ERRNO_AND_VALUE(
Socket(tests[i].domain, tests[i].type, tests[i].protocol));
}
}
TEST(SocketTest, ProtocolInet) {
struct {
int domain, type, protocol;
} tests[] = {
{AF_INET, SOCK_DGRAM, IPPROTO_UDP},
{AF_INET, SOCK_STREAM, IPPROTO_TCP},
};
for (long unsigned int i = 0; i < ABSL_ARRAYSIZE(tests); i++) {
ASSERT_NO_ERRNO_AND_VALUE(
Socket(tests[i].domain, tests[i].type, tests[i].protocol));
}
}
TEST(SocketTest, UnixSocketStat) {
SKIP_IF(IsRunningWithVFS1());
FileDescriptor bound =
ASSERT_NO_ERRNO_AND_VALUE(Socket(AF_UNIX, SOCK_STREAM, PF_UNIX));
// The permissions of the file created with bind(2) should be defined by the
// permissions of the bound socket and the umask.
mode_t sock_perm = 0765, mask = 0123;
ASSERT_THAT(fchmod(bound.get(), sock_perm), SyscallSucceeds());
TempUmask m(mask);
struct sockaddr_un addr =
ASSERT_NO_ERRNO_AND_VALUE(UniqueUnixAddr(/*abstract=*/false, AF_UNIX));
ASSERT_THAT(bind(bound.get(), reinterpret_cast<struct sockaddr*>(&addr),
sizeof(addr)),
SyscallSucceeds());
struct stat statbuf = {};
ASSERT_THAT(stat(addr.sun_path, &statbuf), SyscallSucceeds());
// Mode should be S_IFSOCK.
EXPECT_EQ(statbuf.st_mode, S_IFSOCK | (sock_perm & ~mask));
// Timestamps should be equal and non-zero.
// TODO(b/158882152): Sockets currently don't implement timestamps.
if (!IsRunningOnGvisor()) {
EXPECT_NE(statbuf.st_atime, 0);
EXPECT_EQ(statbuf.st_atime, statbuf.st_mtime);
EXPECT_EQ(statbuf.st_atime, statbuf.st_ctime);
}
}
TEST(SocketTest, UnixSocketStatFS) {
SKIP_IF(IsRunningWithVFS1());
FileDescriptor bound =
ASSERT_NO_ERRNO_AND_VALUE(Socket(AF_UNIX, SOCK_STREAM, PF_UNIX));
struct statfs st;
EXPECT_THAT(fstatfs(bound.get(), &st), SyscallSucceeds());
EXPECT_EQ(st.f_type, SOCKFS_MAGIC);
EXPECT_EQ(st.f_bsize, getpagesize());
EXPECT_EQ(st.f_namelen, NAME_MAX);
}
TEST(SocketTest, UnixSCMRightsOnlyPassedOnce_NoRandomSave) {
const DisableSave ds;
int sockets[2];
ASSERT_THAT(socketpair(AF_UNIX, SOCK_STREAM, 0, sockets), SyscallSucceeds());
// Send more than what will fit inside the send/receive buffers, so that it is
// split into multiple messages.
constexpr int kBufSize = 0x100000;
pid_t pid = fork();
if (pid == 0) {
TEST_PCHECK(close(sockets[0]) == 0);
// Construct a message with some control message.
struct msghdr msg = {};
char control[CMSG_SPACE(sizeof(int))] = {};
std::vector<char> buf(kBufSize);
struct iovec iov = {};
msg.msg_control = control;
msg.msg_controllen = sizeof(control);
struct cmsghdr* cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_len = CMSG_LEN(sizeof(int));
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
((int*)CMSG_DATA(cmsg))[0] = sockets[1];
iov.iov_base = buf.data();
iov.iov_len = kBufSize;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
int n = sendmsg(sockets[1], &msg, 0);
TEST_PCHECK(n == kBufSize);
TEST_PCHECK(shutdown(sockets[1], SHUT_RDWR) == 0);
TEST_PCHECK(close(sockets[1]) == 0);
_exit(0);
}
close(sockets[1]);
struct msghdr msg = {};
char control[CMSG_SPACE(sizeof(int))] = {};
std::vector<char> buf(kBufSize);
struct iovec iov = {};
msg.msg_control = &control;
msg.msg_controllen = sizeof(control);
iov.iov_base = buf.data();
iov.iov_len = kBufSize;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
// The control message should only be present in the first message received.
int n;
ASSERT_THAT(n = recvmsg(sockets[0], &msg, 0), SyscallSucceeds());
ASSERT_GT(n, 0);
ASSERT_EQ(msg.msg_controllen, CMSG_SPACE(sizeof(int)));
while (n > 0) {
ASSERT_THAT(n = recvmsg(sockets[0], &msg, 0), SyscallSucceeds());
ASSERT_EQ(msg.msg_controllen, 0);
}
close(sockets[0]);
int status;
ASSERT_THAT(waitpid(pid, &status, 0), SyscallSucceedsWithValue(pid));
ASSERT_TRUE(WIFEXITED(status) && WEXITSTATUS(status) == 0);
}
using SocketOpenTest = ::testing::TestWithParam<int>;
// UDS cannot be opened.
TEST_P(SocketOpenTest, Unix) {
// FIXME(b/142001530): Open incorrectly succeeds on gVisor.
SKIP_IF(IsRunningWithVFS1());
FileDescriptor bound =
ASSERT_NO_ERRNO_AND_VALUE(Socket(AF_UNIX, SOCK_STREAM, PF_UNIX));
struct sockaddr_un addr =
ASSERT_NO_ERRNO_AND_VALUE(UniqueUnixAddr(/*abstract=*/false, AF_UNIX));
ASSERT_THAT(bind(bound.get(), reinterpret_cast<struct sockaddr*>(&addr),
sizeof(addr)),
SyscallSucceeds());
EXPECT_THAT(open(addr.sun_path, GetParam()), SyscallFailsWithErrno(ENXIO));
}
INSTANTIATE_TEST_SUITE_P(OpenModes, SocketOpenTest,
::testing::Values(O_RDONLY, O_RDWR));
} // namespace testing
} // namespace gvisor
|
