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
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "bpf-socket-bind.h"
#include "load-fragment.h"
#include "manager.h"
#include "process-util.h"
#include "rlimit-util.h"
#include "rm-rf.h"
#include "service.h"
#include "strv.h"
#include "tests.h"
#include "unit.h"
#include "virt.h"
static int find_netcat_executable(char **ret_path) {
char **candidates = STRV_MAKE("ncat", "nc", "netcat");
int r = 0;
STRV_FOREACH(c, candidates) {
r = find_executable(*c, ret_path);
if (r == 0)
break;
}
return r;
}
static int test_socket_bind(
Manager *m,
const char *unit_name,
const char *netcat_path,
const char *port,
char **allow_rules,
char **deny_rules) {
_cleanup_free_ char *exec_start = NULL;
_cleanup_(unit_freep) Unit *u = NULL;
CGroupContext *cc = NULL;
int cld_code, r;
assert_se(u = unit_new(m, sizeof(Service)));
assert_se(unit_add_name(u, unit_name) == 0);
assert_se(cc = unit_get_cgroup_context(u));
STRV_FOREACH(rule, allow_rules) {
r = config_parse_cgroup_socket_bind(
u->id, "filename", 1, "Service", 1, "SocketBindAllow", 0,
*rule, &cc->socket_bind_allow, u);
if (r < 0)
return log_unit_error_errno(u, r, "Failed to parse SocketBindAllow: %m");
}
fprintf(stderr, "SocketBindAllow: ");
cgroup_context_dump_socket_bind_items(cc->socket_bind_allow, stderr);
fputc('\n', stderr);
STRV_FOREACH(rule, deny_rules) {
r = config_parse_cgroup_socket_bind(
u->id, "filename", 1, "Service", 1, "SocketBindDeny", 0,
*rule, &cc->socket_bind_deny, u);
if (r < 0)
return log_unit_error_errno(u, r, "Failed to parse SocketBindDeny: %m");
}
fprintf(stderr, "SocketBindDeny: ");
cgroup_context_dump_socket_bind_items(cc->socket_bind_deny, stderr);
fputc('\n', stderr);
exec_start = strjoin("-timeout --preserve-status -sSIGTERM 1s ", netcat_path, " -l ", port, " -vv");
ASSERT_NOT_NULL(exec_start);
r = config_parse_exec(u->id, "filename", 1, "Service", 1, "ExecStart",
SERVICE_EXEC_START, exec_start, SERVICE(u)->exec_command, u);
if (r < 0)
return log_error_errno(r, "Failed to parse ExecStart");
SERVICE(u)->type = SERVICE_ONESHOT;
u->load_state = UNIT_LOADED;
r = unit_start(u, NULL);
if (r < 0)
return log_error_errno(r, "Unit start failed %m");
while (!IN_SET(SERVICE(u)->state, SERVICE_DEAD, SERVICE_FAILED)) {
r = sd_event_run(m->event, UINT64_MAX);
if (r < 0)
return log_error_errno(r, "Event run failed %m");
}
cld_code = SERVICE(u)->exec_command[SERVICE_EXEC_START]->exec_status.code;
if (cld_code != CLD_EXITED)
return log_error_errno(SYNTHETIC_ERRNO(EBUSY), "ExecStart didn't exited, code='%s'", sigchld_code_to_string(cld_code));
if (SERVICE(u)->state != SERVICE_DEAD)
return log_error_errno(SYNTHETIC_ERRNO(EBUSY), "Service is not dead");
return 0;
}
int main(int argc, char *argv[]) {
_cleanup_free_ char *unit_dir = NULL, *netcat_path = NULL;
_cleanup_(rm_rf_physical_and_freep) char *runtime_dir = NULL;
_cleanup_(manager_freep) Manager *m = NULL;
struct rlimit rl;
int r;
test_setup_logging(LOG_DEBUG);
if (detect_container() > 0)
return log_tests_skipped("test-socket-bind fails inside LXC and Docker containers: https://github.com/systemd/systemd/issues/9666");
assert_se(getrlimit(RLIMIT_MEMLOCK, &rl) >= 0);
rl.rlim_cur = rl.rlim_max = MAX(rl.rlim_max, CAN_MEMLOCK_SIZE);
(void) setrlimit_closest(RLIMIT_MEMLOCK, &rl);
if (!can_memlock())
return log_tests_skipped("Can't use mlock()");
r = bpf_socket_bind_supported();
if (r <= 0)
return log_tests_skipped("socket-bind is not supported");
if (find_netcat_executable(&netcat_path) != 0)
return log_tests_skipped("Cannot find netcat executable");
r = enter_cgroup_subroot(NULL);
if (r == -ENOMEDIUM)
return log_tests_skipped("cgroupfs not available");
assert_se(get_testdata_dir("units", &unit_dir) >= 0);
assert_se(set_unit_path(unit_dir) >= 0);
assert_se(runtime_dir = setup_fake_runtime_dir());
assert_se(manager_new(RUNTIME_SCOPE_USER, MANAGER_TEST_RUN_BASIC, &m) >= 0);
assert_se(manager_startup(m, NULL, NULL, NULL) >= 0);
assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "2000", STRV_MAKE("2000"), STRV_MAKE("any")) >= 0);
assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "2000", STRV_MAKE("ipv6:2001-2002"), STRV_MAKE("any")) >= 0);
assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "6666", STRV_MAKE("ipv4:6666", "6667"), STRV_MAKE("any")) >= 0);
assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "6666", STRV_MAKE("6667", "6668", ""), STRV_MAKE("any")) >= 0);
assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "7777", STRV_MAKE_EMPTY, STRV_MAKE_EMPTY) >= 0);
assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "8888", STRV_MAKE("any"), STRV_MAKE("any")) >= 0);
assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "8888", STRV_MAKE("ipv6:tcp:8888-8889"), STRV_MAKE("any")) >= 0);
assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "10000", STRV_MAKE("ipv6:udp:9999-10000"), STRV_MAKE("any")) >= 0);
assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "6666", STRV_MAKE("ipv4:tcp:6666"), STRV_MAKE("any")) >= 0);
assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "6666", STRV_MAKE("ipv4:udp:6666"), STRV_MAKE("any")) >= 0);
assert_se(test_socket_bind(m, "socket_bind_test.service", netcat_path, "6666", STRV_MAKE("tcp:6666"), STRV_MAKE("any")) >= 0);
return 0;
}
|
