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
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
|
/* SPDX-License-Identifier: LGPL-2.1+ */
#include <arpa/inet.h>
#include <errno.h>
#include <net/ethernet.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "sd-event.h"
#include "sd-lldp.h"
#include "alloc-util.h"
#include "fd-util.h"
#include "lldp-network.h"
#include "macro.h"
#include "string-util.h"
#define TEST_LLDP_PORT "em1"
#define TEST_LLDP_TYPE_SYSTEM_NAME "systemd-lldp"
#define TEST_LLDP_TYPE_SYSTEM_DESC "systemd-lldp-desc"
static int test_fd[2] = { -1, -1 };
static int lldp_handler_calls;
int lldp_network_bind_raw_socket(int ifindex) {
if (socketpair(AF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 0, test_fd) < 0)
return -errno;
return test_fd[0];
}
static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
lldp_handler_calls++;
}
static int start_lldp(sd_lldp **lldp, sd_event *e, sd_lldp_callback_t cb, void *cb_data) {
int r;
r = sd_lldp_new(lldp);
if (r < 0)
return r;
r = sd_lldp_set_ifindex(*lldp, 42);
if (r < 0)
return r;
r = sd_lldp_set_callback(*lldp, cb, cb_data);
if (r < 0)
return r;
r = sd_lldp_attach_event(*lldp, e, 0);
if (r < 0)
return r;
r = sd_lldp_start(*lldp);
if (r < 0)
return r;
return 0;
}
static int stop_lldp(sd_lldp *lldp) {
int r;
r = sd_lldp_stop(lldp);
if (r < 0)
return r;
r = sd_lldp_detach_event(lldp);
if (r < 0)
return r;
sd_lldp_unref(lldp);
safe_close(test_fd[1]);
return 0;
}
static void test_receive_basic_packet(sd_event *e) {
static const uint8_t frame[] = {
/* Ethernet header */
0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
0x88, 0xcc, /* Ethertype */
/* LLDP mandatory TLVs */
0x02, 0x07, 0x04, 0x00, 0x01, 0x02, /* Chassis: MAC, 00:01:02:03:04:05 */
0x03, 0x04, 0x05,
0x04, 0x04, 0x05, 0x31, 0x2f, 0x33, /* Port: interface name, "1/3" */
0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
/* LLDP optional TLVs */
0x08, 0x04, 0x50, 0x6f, 0x72, 0x74, /* Port Description: "Port" */
0x0a, 0x03, 0x53, 0x59, 0x53, /* System Name: "SYS" */
0x0c, 0x04, 0x66, 0x6f, 0x6f, 0x00, /* System Description: "foo" (NULL-terminated) */
0x00, 0x00 /* End Of LLDPDU */
};
sd_lldp *lldp;
sd_lldp_neighbor **neighbors;
uint8_t type;
const void *data;
uint16_t ttl;
size_t length;
const char *str;
lldp_handler_calls = 0;
assert_se(start_lldp(&lldp, e, lldp_handler, NULL) == 0);
assert_se(write(test_fd[1], frame, sizeof(frame)) == sizeof(frame));
sd_event_run(e, 0);
assert_se(lldp_handler_calls == 1);
assert_se(sd_lldp_get_neighbors(lldp, &neighbors) == 1);
assert_se(sd_lldp_neighbor_get_chassis_id(neighbors[0], &type, &data, &length) == 0);
assert_se(type == SD_LLDP_CHASSIS_SUBTYPE_MAC_ADDRESS);
assert_se(length == ETH_ALEN);
assert_se(!memcmp(data, "\x00\x01\x02\x03\x04\x05", ETH_ALEN));
assert_se(sd_lldp_neighbor_get_port_id(neighbors[0], &type, &data, &length) == 0);
assert_se(type == SD_LLDP_PORT_SUBTYPE_INTERFACE_NAME);
assert_se(length == 3);
assert_se(!memcmp(data, "1/3", 3));
assert_se(sd_lldp_neighbor_get_port_description(neighbors[0], &str) == 0);
assert_se(streq(str, "Port"));
assert_se(sd_lldp_neighbor_get_system_name(neighbors[0], &str) == 0);
assert_se(streq(str, "SYS"));
assert_se(sd_lldp_neighbor_get_system_description(neighbors[0], &str) == 0);
assert_se(streq(str, "foo"));
assert_se(sd_lldp_neighbor_get_ttl(neighbors[0], &ttl) == 0);
assert_se(ttl == 120);
sd_lldp_neighbor_unref(neighbors[0]);
free(neighbors);
assert_se(stop_lldp(lldp) == 0);
}
static void test_receive_incomplete_packet(sd_event *e) {
sd_lldp *lldp;
sd_lldp_neighbor **neighbors;
uint8_t frame[] = {
/* Ethernet header */
0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
0x88, 0xcc, /* Ethertype */
/* LLDP mandatory TLVs */
0x02, 0x07, 0x04, 0x00, 0x01, 0x02, /* Chassis: MAC, 00:01:02:03:04:05 */
0x03, 0x04, 0x05,
0x04, 0x04, 0x05, 0x31, 0x2f, 0x33, /* Port: interface name, "1/3" */
/* Missing TTL */
0x00, 0x00 /* End Of LLDPDU */
};
lldp_handler_calls = 0;
assert_se(start_lldp(&lldp, e, lldp_handler, NULL) == 0);
assert_se(write(test_fd[1], frame, sizeof(frame)) == sizeof(frame));
sd_event_run(e, 0);
assert_se(lldp_handler_calls == 0);
assert_se(sd_lldp_get_neighbors(lldp, &neighbors) == 0);
assert_se(stop_lldp(lldp) == 0);
}
static void test_receive_oui_packet(sd_event *e) {
sd_lldp *lldp;
sd_lldp_neighbor **neighbors;
uint8_t frame[] = {
/* Ethernet header */
0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
0x88, 0xcc, /* Ethertype */
/* LLDP mandatory TLVs */
0x02, 0x07, 0x04, 0x00, 0x01, 0x02, /* Chassis: MAC, 00:01:02:03:04:05 */
0x03, 0x04, 0x05,
0x04, 0x04, 0x05, 0x31, 0x2f, 0x33, /* Port TLV: interface name, "1/3" */
0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
/* LLDP optional TLVs */
0xfe, 0x06, 0x00, 0x80, 0xc2, 0x01, /* Port VLAN ID: 0x1234 */
0x12, 0x34,
0xfe, 0x07, 0x00, 0x80, 0xc2, 0x02, /* Port and protocol: flag 1, PPVID 0x7788 */
0x01, 0x77, 0x88,
0xfe, 0x0d, 0x00, 0x80, 0xc2, 0x03, /* VLAN Name: ID 0x1234, name "Vlan51" */
0x12, 0x34, 0x06, 0x56, 0x6c, 0x61,
0x6e, 0x35, 0x31,
0xfe, 0x06, 0x00, 0x80, 0xc2, 0x06, /* Management VID: 0x0102 */
0x01, 0x02,
0xfe, 0x09, 0x00, 0x80, 0xc2, 0x07, /* Link aggregation: status 1, ID 0x00140012 */
0x01, 0x00, 0x14, 0x00, 0x12,
0xfe, 0x07, 0x00, 0x12, 0x0f, 0x02, /* 802.3 Power via MDI: PSE, MDI enabled */
0x07, 0x01, 0x00,
0x00, 0x00 /* End of LLDPDU */
};
lldp_handler_calls = 0;
assert_se(start_lldp(&lldp, e, lldp_handler, NULL) == 0);
assert_se(write(test_fd[1], frame, sizeof(frame)) == sizeof(frame));
sd_event_run(e, 0);
assert_se(lldp_handler_calls == 1);
assert_se(sd_lldp_get_neighbors(lldp, &neighbors) == 1);
assert_se(sd_lldp_neighbor_tlv_rewind(neighbors[0]) >= 0);
assert_se(sd_lldp_neighbor_tlv_is_type(neighbors[0], SD_LLDP_TYPE_CHASSIS_ID) > 0);
assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
assert_se(sd_lldp_neighbor_tlv_is_type(neighbors[0], SD_LLDP_TYPE_PORT_ID) > 0);
assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
assert_se(sd_lldp_neighbor_tlv_is_type(neighbors[0], SD_LLDP_TYPE_TTL) > 0);
assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
assert_se(sd_lldp_neighbor_tlv_is_oui(neighbors[0], SD_LLDP_OUI_802_1, SD_LLDP_OUI_802_1_SUBTYPE_PORT_VLAN_ID) > 0);
assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
assert_se(sd_lldp_neighbor_tlv_is_oui(neighbors[0], SD_LLDP_OUI_802_1, SD_LLDP_OUI_802_1_SUBTYPE_PORT_PROTOCOL_VLAN_ID) > 0);
assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
assert_se(sd_lldp_neighbor_tlv_is_oui(neighbors[0], SD_LLDP_OUI_802_1, SD_LLDP_OUI_802_1_SUBTYPE_VLAN_NAME) > 0);
assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
assert_se(sd_lldp_neighbor_tlv_is_oui(neighbors[0], SD_LLDP_OUI_802_1, SD_LLDP_OUI_802_1_SUBTYPE_MANAGEMENT_VID) > 0);
assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
assert_se(sd_lldp_neighbor_tlv_is_oui(neighbors[0], SD_LLDP_OUI_802_1, SD_LLDP_OUI_802_1_SUBTYPE_LINK_AGGREGATION) > 0);
assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
assert_se(sd_lldp_neighbor_tlv_is_oui(neighbors[0], SD_LLDP_OUI_802_3, SD_LLDP_OUI_802_3_SUBTYPE_POWER_VIA_MDI) > 0);
assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
assert_se(sd_lldp_neighbor_tlv_is_type(neighbors[0], SD_LLDP_TYPE_END) > 0);
assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) == 0);
sd_lldp_neighbor_unref(neighbors[0]);
free(neighbors);
assert_se(stop_lldp(lldp) == 0);
}
static void test_multiple_neighbors_sorted(sd_event *e) {
static const uint8_t frame1[] = {
/* Ethernet header */
0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
0x88, 0xcc, /* Ethertype */
/* LLDP mandatory TLVs */
0x02, 0x04, 0x01, '1', '/', '2', /* Chassis component: "1/2" */
0x04, 0x04, 0x02, '2', '/', '3', /* Port component: "2/3" */
0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
0x00, 0x00 /* End Of LLDPDU */
};
static const uint8_t frame2[] = {
/* Ethernet header */
0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
0x88, 0xcc, /* Ethertype */
/* LLDP mandatory TLVs */
0x02, 0x04, 0x01, '2', '/', '1', /* Chassis component: "2/1" */
0x04, 0x04, 0x02, '1', '/', '3', /* Port component: "1/3" */
0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
0x00, 0x00 /* End Of LLDPDU */
};
static const uint8_t frame3[] = {
/* Ethernet header */
0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
0x88, 0xcc, /* Ethertype */
/* LLDP mandatory TLVs */
0x02, 0x05, 0x01, '2', '/', '1', '0', /* Chassis component: "2/10" */
0x04, 0x04, 0x02, '1', '/', '0', /* Port component: "1/0" */
0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
0x00, 0x00 /* End Of LLDPDU */
};
static const uint8_t frame4[] = {
/* Ethernet header */
0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
0x88, 0xcc, /* Ethertype */
/* LLDP mandatory TLVs */
0x02, 0x05, 0x01, '2', '/', '1', '9', /* Chassis component: "2/19" */
0x04, 0x04, 0x02, '1', '/', '0', /* Port component: "1/0" */
0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
0x00, 0x00 /* End Of LLDPDU */
};
static const uint8_t frame5[] = {
/* Ethernet header */
0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
0x88, 0xcc, /* Ethertype */
/* LLDP mandatory TLVs */
0x02, 0x04, 0x01, '1', '/', '2', /* Chassis component: "1/2" */
0x04, 0x05, 0x02, '2', '/', '1', '0', /* Port component: "2/10" */
0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
0x00, 0x00 /* End Of LLDPDU */
};
static const uint8_t frame6[] = {
/* Ethernet header */
0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
0x88, 0xcc, /* Ethertype */
/* LLDP mandatory TLVs */
0x02, 0x04, 0x01, '1', '/', '2', /* Chassis component: "1/2" */
0x04, 0x05, 0x02, '2', '/', '3', '9', /* Port component: "2/10" */
0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
0x00, 0x00 /* End Of LLDPDU */
};
static const char* expected[] = {
/* ordered pairs of Chassis+Port */
"1/2", "2/10",
"1/2", "2/3",
"1/2", "2/39",
"2/1", "1/3",
"2/10", "1/0",
"2/19", "1/0",
};
sd_lldp *lldp;
sd_lldp_neighbor **neighbors;
int i;
uint8_t type;
const void *data;
size_t length, expected_length;
uint16_t ttl;
lldp_handler_calls = 0;
assert_se(start_lldp(&lldp, e, lldp_handler, NULL) == 0);
assert_se(write(test_fd[1], frame1, sizeof(frame1)) == sizeof(frame1));
sd_event_run(e, 0);
assert_se(write(test_fd[1], frame2, sizeof(frame2)) == sizeof(frame2));
sd_event_run(e, 0);
assert_se(write(test_fd[1], frame3, sizeof(frame3)) == sizeof(frame3));
sd_event_run(e, 0);
assert_se(write(test_fd[1], frame4, sizeof(frame4)) == sizeof(frame4));
sd_event_run(e, 0);
assert_se(write(test_fd[1], frame5, sizeof(frame5)) == sizeof(frame5));
sd_event_run(e, 0);
assert_se(write(test_fd[1], frame6, sizeof(frame6)) == sizeof(frame6));
sd_event_run(e, 0);
assert_se(lldp_handler_calls == 6);
assert_se(sd_lldp_get_neighbors(lldp, &neighbors) == 6);
for (i = 0; i < 6; i++) {
assert_se(sd_lldp_neighbor_get_chassis_id(neighbors[i], &type, &data, &length) == 0);
assert_se(type == SD_LLDP_CHASSIS_SUBTYPE_CHASSIS_COMPONENT);
expected_length = strlen(expected[2 * i]);
assert_se(length == expected_length);
assert_se(memcmp(data, expected[2 * i], expected_length) == 0);
assert_se(sd_lldp_neighbor_get_port_id(neighbors[i], &type, &data, &length) == 0);
assert_se(type == SD_LLDP_PORT_SUBTYPE_PORT_COMPONENT);
expected_length = strlen(expected[2 * i + 1]);
assert_se(length == expected_length);
assert_se(memcmp(data, expected[2 * i + 1], expected_length) == 0);
assert_se(sd_lldp_neighbor_get_ttl(neighbors[i], &ttl) == 0);
assert_se(ttl == 120);
}
for (i = 0; i < 6; i++)
sd_lldp_neighbor_unref(neighbors[i]);
free(neighbors);
assert_se(stop_lldp(lldp) == 0);
}
int main(int argc, char *argv[]) {
_cleanup_(sd_event_unrefp) sd_event *e = NULL;
log_set_max_level(LOG_DEBUG);
/* LLDP reception tests */
assert_se(sd_event_new(&e) == 0);
test_receive_basic_packet(e);
test_receive_incomplete_packet(e);
test_receive_oui_packet(e);
test_multiple_neighbors_sorted(e);
return 0;
}
|
