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
|
/*
* Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
* Copyright (c) 2017-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <string.h>
#include <stdio.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include "netlink.h"
#include "netlink_kobject_uevent.h"
static const char *errstr;
static ssize_t
sys_send(const int fd, const void *const buf, const size_t len)
{
const ssize_t rc = sendto(fd, buf, len, MSG_DONTWAIT, NULL, 0);
errstr = sprintrc(rc);
return rc;
}
static void
test_nlmsg_type_udev(const int fd)
{
static const char extra[] = "12345678";
struct udev_monitor_netlink_header uh = {
.prefix = "libudev",
.magic = htonl(0xfeedcafe),
.header_size = sizeof(uh),
.properties_off = 40,
.properties_len = 299,
.filter_subsystem_hash = htonl(0xc370b302),
.filter_devtype_hash = htonl(0x10800000),
.filter_tag_bloom_hi = htonl(0x2000400),
.filter_tag_bloom_lo = htonl(0x10800000),
};
const unsigned int extra_len = LENGTH_OF(extra);
const unsigned int uh_len = sizeof(uh);
char *const buf = tail_alloc(uh_len + extra_len);
memcpy(buf + extra_len, &uh, uh_len);
sys_send(fd, buf + extra_len, uh_len);
printf("sendto(%d, {prefix=\"%s\", magic=htonl(%#x)"
", header_size=%u, properties_off=%u, properties_len=%u"
", filter_subsystem_hash=htonl(%#x)"
", filter_devtype_hash=htonl(%#x)"
", filter_tag_bloom_hi=htonl(%#x)"
", filter_tag_bloom_lo=htonl(%#x)}, %u, MSG_DONTWAIT, NULL, "
"0) = %s\n"
, fd, uh.prefix,
ntohl(uh.magic), uh.header_size, uh.properties_off,
uh.properties_len, ntohl(uh.filter_subsystem_hash),
ntohl(uh.filter_devtype_hash), ntohl(uh.filter_tag_bloom_hi),
ntohl(uh.filter_tag_bloom_lo), uh_len, errstr);
memcpy(buf, &uh, uh_len);
memcpy(buf + uh_len, extra, extra_len);
sys_send(fd, buf, uh_len + extra_len);
printf("sendto(%d, [{prefix=\"%s\", magic=htonl(%#x)"
", header_size=%u, properties_off=%u, properties_len=%u"
", filter_subsystem_hash=htonl(%#x)"
", filter_devtype_hash=htonl(%#x)"
", filter_tag_bloom_hi=htonl(%#x)"
", filter_tag_bloom_lo=htonl(%#x)}, "
, fd, uh.prefix,
ntohl(uh.magic), uh.header_size, uh.properties_off,
uh.properties_len, ntohl(uh.filter_subsystem_hash),
ntohl(uh.filter_devtype_hash), ntohl(uh.filter_tag_bloom_hi),
ntohl(uh.filter_tag_bloom_lo));
print_quoted_memory(buf + uh_len, extra_len);
printf("], %u, MSG_DONTWAIT, NULL, 0) = %s\n",
uh_len + extra_len, errstr);
memcpy(buf + extra_len + 1, &uh, uh_len - 1);
sys_send(fd, buf + extra_len + 1, uh_len);
printf("sendto(%d, ", fd);
print_quoted_memory(&uh, MIN(uh_len - 1, DEFAULT_STRLEN));
printf("%s, %u, MSG_DONTWAIT, NULL, 0) = %s\n",
(uh_len - 1 > DEFAULT_STRLEN ? "..." : ""),
uh_len, errstr);
}
static void
test_nlmsg_type_kernel(const int fd)
{
struct udev_monitor_netlink_header uh = {
.prefix = "change@",
.magic = htonl(0xfeedcafe),
.header_size = sizeof(uh),
.properties_off = 10,
.properties_len = 299,
.filter_subsystem_hash = htonl(0xfffffff),
.filter_devtype_hash = htonl(0x10000000),
.filter_tag_bloom_hi = htonl(0x2000400),
};
const unsigned int uh_len = sizeof(uh);
TAIL_ALLOC_OBJECT_CONST_PTR(struct udev_monitor_netlink_header, p);
memcpy(p, &uh, uh_len);
sys_send(fd, p, uh_len);
printf("sendto(%d, ", fd);
print_quoted_memory(&uh, MIN(uh_len, DEFAULT_STRLEN));
printf("%s, %u, MSG_DONTWAIT, NULL, 0) = %s\n",
(uh_len > DEFAULT_STRLEN ? "..." : ""),
uh_len, errstr);
}
int
main(void)
{
skip_if_unavailable("/proc/self/fd/");
int fd = create_nl_socket(NETLINK_KOBJECT_UEVENT);
test_nlmsg_type_udev(fd);
test_nlmsg_type_kernel(fd);
/* test using data that looks like a zero-length C string */
char *const buf = tail_alloc(DEFAULT_STRLEN + 1);
buf[0] = '=';
fill_memory_ex(buf + 1, DEFAULT_STRLEN, 0, DEFAULT_STRLEN);
sys_send(fd, buf + 1, DEFAULT_STRLEN);
printf("sendto(%d, ", fd);
print_quoted_memory(buf + 1, DEFAULT_STRLEN);
printf(", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
DEFAULT_STRLEN, errstr);
sys_send(fd, buf, DEFAULT_STRLEN + 1);
printf("sendto(%d, ", fd);
print_quoted_memory(buf, DEFAULT_STRLEN);
printf("..., %u, MSG_DONTWAIT, NULL, 0) = %s\n",
DEFAULT_STRLEN + 1, errstr);
puts("+++ exited with 0 +++");
return 0;
}
|
