Line data Source code
1 : /* SPDX-License-Identifier: LGPL-2.1+ */
2 :
3 : #include <arpa/inet.h>
4 : #include <errno.h>
5 : #include <net/ethernet.h>
6 : #include <stdio.h>
7 : #include <string.h>
8 : #include <unistd.h>
9 :
10 : #include "sd-event.h"
11 : #include "sd-lldp.h"
12 :
13 : #include "alloc-util.h"
14 : #include "fd-util.h"
15 : #include "lldp-network.h"
16 : #include "macro.h"
17 : #include "string-util.h"
18 : #include "tests.h"
19 :
20 : #define TEST_LLDP_PORT "em1"
21 : #define TEST_LLDP_TYPE_SYSTEM_NAME "systemd-lldp"
22 : #define TEST_LLDP_TYPE_SYSTEM_DESC "systemd-lldp-desc"
23 :
24 : static int test_fd[2] = { -1, -1 };
25 : static int lldp_handler_calls;
26 :
27 4 : int lldp_network_bind_raw_socket(int ifindex) {
28 4 : if (socketpair(AF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 0, test_fd) < 0)
29 0 : return -errno;
30 :
31 4 : return test_fd[0];
32 : }
33 :
34 8 : static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata) {
35 8 : lldp_handler_calls++;
36 8 : }
37 :
38 4 : static int start_lldp(sd_lldp **lldp, sd_event *e, sd_lldp_callback_t cb, void *cb_data) {
39 : int r;
40 :
41 4 : r = sd_lldp_new(lldp);
42 4 : if (r < 0)
43 0 : return r;
44 :
45 4 : r = sd_lldp_set_ifindex(*lldp, 42);
46 4 : if (r < 0)
47 0 : return r;
48 :
49 4 : r = sd_lldp_set_callback(*lldp, cb, cb_data);
50 4 : if (r < 0)
51 0 : return r;
52 :
53 4 : r = sd_lldp_attach_event(*lldp, e, 0);
54 4 : if (r < 0)
55 0 : return r;
56 :
57 4 : r = sd_lldp_start(*lldp);
58 4 : if (r < 0)
59 0 : return r;
60 :
61 4 : return 0;
62 : }
63 :
64 4 : static int stop_lldp(sd_lldp *lldp) {
65 : int r;
66 :
67 4 : r = sd_lldp_stop(lldp);
68 4 : if (r < 0)
69 0 : return r;
70 :
71 4 : r = sd_lldp_detach_event(lldp);
72 4 : if (r < 0)
73 0 : return r;
74 :
75 4 : sd_lldp_unref(lldp);
76 4 : safe_close(test_fd[1]);
77 :
78 4 : return 0;
79 : }
80 :
81 1 : static void test_receive_basic_packet(sd_event *e) {
82 :
83 : static const uint8_t frame[] = {
84 : /* Ethernet header */
85 : 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
86 : 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
87 : 0x88, 0xcc, /* Ethertype */
88 : /* LLDP mandatory TLVs */
89 : 0x02, 0x07, 0x04, 0x00, 0x01, 0x02, /* Chassis: MAC, 00:01:02:03:04:05 */
90 : 0x03, 0x04, 0x05,
91 : 0x04, 0x04, 0x05, 0x31, 0x2f, 0x33, /* Port: interface name, "1/3" */
92 : 0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
93 : /* LLDP optional TLVs */
94 : 0x08, 0x04, 0x50, 0x6f, 0x72, 0x74, /* Port Description: "Port" */
95 : 0x0a, 0x03, 0x53, 0x59, 0x53, /* System Name: "SYS" */
96 : 0x0c, 0x04, 0x66, 0x6f, 0x6f, 0x00, /* System Description: "foo" (NULL-terminated) */
97 : 0x00, 0x00 /* End Of LLDPDU */
98 : };
99 :
100 : sd_lldp *lldp;
101 : sd_lldp_neighbor **neighbors;
102 : uint8_t type;
103 : const void *data;
104 : uint16_t ttl;
105 : size_t length;
106 : const char *str;
107 :
108 1 : lldp_handler_calls = 0;
109 1 : assert_se(start_lldp(&lldp, e, lldp_handler, NULL) == 0);
110 :
111 1 : assert_se(write(test_fd[1], frame, sizeof(frame)) == sizeof(frame));
112 1 : sd_event_run(e, 0);
113 1 : assert_se(lldp_handler_calls == 1);
114 1 : assert_se(sd_lldp_get_neighbors(lldp, &neighbors) == 1);
115 :
116 1 : assert_se(sd_lldp_neighbor_get_chassis_id(neighbors[0], &type, &data, &length) == 0);
117 1 : assert_se(type == SD_LLDP_CHASSIS_SUBTYPE_MAC_ADDRESS);
118 1 : assert_se(length == ETH_ALEN);
119 1 : assert_se(!memcmp(data, "\x00\x01\x02\x03\x04\x05", ETH_ALEN));
120 :
121 1 : assert_se(sd_lldp_neighbor_get_port_id(neighbors[0], &type, &data, &length) == 0);
122 1 : assert_se(type == SD_LLDP_PORT_SUBTYPE_INTERFACE_NAME);
123 1 : assert_se(length == 3);
124 1 : assert_se(!memcmp(data, "1/3", 3));
125 :
126 1 : assert_se(sd_lldp_neighbor_get_port_description(neighbors[0], &str) == 0);
127 1 : assert_se(streq(str, "Port"));
128 :
129 1 : assert_se(sd_lldp_neighbor_get_system_name(neighbors[0], &str) == 0);
130 1 : assert_se(streq(str, "SYS"));
131 :
132 1 : assert_se(sd_lldp_neighbor_get_system_description(neighbors[0], &str) == 0);
133 1 : assert_se(streq(str, "foo"));
134 :
135 1 : assert_se(sd_lldp_neighbor_get_ttl(neighbors[0], &ttl) == 0);
136 1 : assert_se(ttl == 120);
137 :
138 1 : sd_lldp_neighbor_unref(neighbors[0]);
139 1 : free(neighbors);
140 :
141 1 : assert_se(stop_lldp(lldp) == 0);
142 1 : }
143 :
144 1 : static void test_receive_incomplete_packet(sd_event *e) {
145 : sd_lldp *lldp;
146 : sd_lldp_neighbor **neighbors;
147 1 : uint8_t frame[] = {
148 : /* Ethernet header */
149 : 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
150 : 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
151 : 0x88, 0xcc, /* Ethertype */
152 : /* LLDP mandatory TLVs */
153 : 0x02, 0x07, 0x04, 0x00, 0x01, 0x02, /* Chassis: MAC, 00:01:02:03:04:05 */
154 : 0x03, 0x04, 0x05,
155 : 0x04, 0x04, 0x05, 0x31, 0x2f, 0x33, /* Port: interface name, "1/3" */
156 : /* Missing TTL */
157 : 0x00, 0x00 /* End Of LLDPDU */
158 : };
159 :
160 1 : lldp_handler_calls = 0;
161 1 : assert_se(start_lldp(&lldp, e, lldp_handler, NULL) == 0);
162 :
163 1 : assert_se(write(test_fd[1], frame, sizeof(frame)) == sizeof(frame));
164 1 : sd_event_run(e, 0);
165 1 : assert_se(lldp_handler_calls == 0);
166 1 : assert_se(sd_lldp_get_neighbors(lldp, &neighbors) == 0);
167 :
168 1 : assert_se(stop_lldp(lldp) == 0);
169 1 : }
170 :
171 1 : static void test_receive_oui_packet(sd_event *e) {
172 : sd_lldp *lldp;
173 : sd_lldp_neighbor **neighbors;
174 1 : uint8_t frame[] = {
175 : /* Ethernet header */
176 : 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
177 : 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
178 : 0x88, 0xcc, /* Ethertype */
179 : /* LLDP mandatory TLVs */
180 : 0x02, 0x07, 0x04, 0x00, 0x01, 0x02, /* Chassis: MAC, 00:01:02:03:04:05 */
181 : 0x03, 0x04, 0x05,
182 : 0x04, 0x04, 0x05, 0x31, 0x2f, 0x33, /* Port TLV: interface name, "1/3" */
183 : 0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
184 : /* LLDP optional TLVs */
185 : 0xfe, 0x06, 0x00, 0x80, 0xc2, 0x01, /* Port VLAN ID: 0x1234 */
186 : 0x12, 0x34,
187 : 0xfe, 0x07, 0x00, 0x80, 0xc2, 0x02, /* Port and protocol: flag 1, PPVID 0x7788 */
188 : 0x01, 0x77, 0x88,
189 : 0xfe, 0x0d, 0x00, 0x80, 0xc2, 0x03, /* VLAN Name: ID 0x1234, name "Vlan51" */
190 : 0x12, 0x34, 0x06, 0x56, 0x6c, 0x61,
191 : 0x6e, 0x35, 0x31,
192 : 0xfe, 0x06, 0x00, 0x80, 0xc2, 0x06, /* Management VID: 0x0102 */
193 : 0x01, 0x02,
194 : 0xfe, 0x09, 0x00, 0x80, 0xc2, 0x07, /* Link aggregation: status 1, ID 0x00140012 */
195 : 0x01, 0x00, 0x14, 0x00, 0x12,
196 : 0xfe, 0x07, 0x00, 0x12, 0x0f, 0x02, /* 802.3 Power via MDI: PSE, MDI enabled */
197 : 0x07, 0x01, 0x00,
198 : 0x00, 0x00 /* End of LLDPDU */
199 : };
200 :
201 1 : lldp_handler_calls = 0;
202 1 : assert_se(start_lldp(&lldp, e, lldp_handler, NULL) == 0);
203 :
204 1 : assert_se(write(test_fd[1], frame, sizeof(frame)) == sizeof(frame));
205 1 : sd_event_run(e, 0);
206 1 : assert_se(lldp_handler_calls == 1);
207 1 : assert_se(sd_lldp_get_neighbors(lldp, &neighbors) == 1);
208 :
209 1 : assert_se(sd_lldp_neighbor_tlv_rewind(neighbors[0]) >= 0);
210 1 : assert_se(sd_lldp_neighbor_tlv_is_type(neighbors[0], SD_LLDP_TYPE_CHASSIS_ID) > 0);
211 1 : assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
212 1 : assert_se(sd_lldp_neighbor_tlv_is_type(neighbors[0], SD_LLDP_TYPE_PORT_ID) > 0);
213 1 : assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
214 1 : assert_se(sd_lldp_neighbor_tlv_is_type(neighbors[0], SD_LLDP_TYPE_TTL) > 0);
215 1 : assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
216 1 : 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);
217 1 : assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
218 1 : 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);
219 1 : assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
220 1 : assert_se(sd_lldp_neighbor_tlv_is_oui(neighbors[0], SD_LLDP_OUI_802_1, SD_LLDP_OUI_802_1_SUBTYPE_VLAN_NAME) > 0);
221 1 : assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
222 1 : assert_se(sd_lldp_neighbor_tlv_is_oui(neighbors[0], SD_LLDP_OUI_802_1, SD_LLDP_OUI_802_1_SUBTYPE_MANAGEMENT_VID) > 0);
223 1 : assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
224 1 : assert_se(sd_lldp_neighbor_tlv_is_oui(neighbors[0], SD_LLDP_OUI_802_1, SD_LLDP_OUI_802_1_SUBTYPE_LINK_AGGREGATION) > 0);
225 1 : assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
226 1 : 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);
227 1 : assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
228 1 : assert_se(sd_lldp_neighbor_tlv_is_type(neighbors[0], SD_LLDP_TYPE_END) > 0);
229 1 : assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) == 0);
230 :
231 1 : sd_lldp_neighbor_unref(neighbors[0]);
232 1 : free(neighbors);
233 :
234 1 : assert_se(stop_lldp(lldp) == 0);
235 1 : }
236 :
237 1 : static void test_multiple_neighbors_sorted(sd_event *e) {
238 :
239 : static const uint8_t frame1[] = {
240 : /* Ethernet header */
241 : 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
242 : 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
243 : 0x88, 0xcc, /* Ethertype */
244 : /* LLDP mandatory TLVs */
245 : 0x02, 0x04, 0x01, '1', '/', '2', /* Chassis component: "1/2" */
246 : 0x04, 0x04, 0x02, '2', '/', '3', /* Port component: "2/3" */
247 : 0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
248 : 0x00, 0x00 /* End Of LLDPDU */
249 : };
250 : static const uint8_t frame2[] = {
251 : /* Ethernet header */
252 : 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
253 : 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
254 : 0x88, 0xcc, /* Ethertype */
255 : /* LLDP mandatory TLVs */
256 : 0x02, 0x04, 0x01, '2', '/', '1', /* Chassis component: "2/1" */
257 : 0x04, 0x04, 0x02, '1', '/', '3', /* Port component: "1/3" */
258 : 0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
259 : 0x00, 0x00 /* End Of LLDPDU */
260 : };
261 : static const uint8_t frame3[] = {
262 : /* Ethernet header */
263 : 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
264 : 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
265 : 0x88, 0xcc, /* Ethertype */
266 : /* LLDP mandatory TLVs */
267 : 0x02, 0x05, 0x01, '2', '/', '1', '0', /* Chassis component: "2/10" */
268 : 0x04, 0x04, 0x02, '1', '/', '0', /* Port component: "1/0" */
269 : 0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
270 : 0x00, 0x00 /* End Of LLDPDU */
271 : };
272 : static const uint8_t frame4[] = {
273 : /* Ethernet header */
274 : 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
275 : 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
276 : 0x88, 0xcc, /* Ethertype */
277 : /* LLDP mandatory TLVs */
278 : 0x02, 0x05, 0x01, '2', '/', '1', '9', /* Chassis component: "2/19" */
279 : 0x04, 0x04, 0x02, '1', '/', '0', /* Port component: "1/0" */
280 : 0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
281 : 0x00, 0x00 /* End Of LLDPDU */
282 : };
283 : static const uint8_t frame5[] = {
284 : /* Ethernet header */
285 : 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
286 : 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
287 : 0x88, 0xcc, /* Ethertype */
288 : /* LLDP mandatory TLVs */
289 : 0x02, 0x04, 0x01, '1', '/', '2', /* Chassis component: "1/2" */
290 : 0x04, 0x05, 0x02, '2', '/', '1', '0', /* Port component: "2/10" */
291 : 0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
292 : 0x00, 0x00 /* End Of LLDPDU */
293 : };
294 : static const uint8_t frame6[] = {
295 : /* Ethernet header */
296 : 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
297 : 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
298 : 0x88, 0xcc, /* Ethertype */
299 : /* LLDP mandatory TLVs */
300 : 0x02, 0x04, 0x01, '1', '/', '2', /* Chassis component: "1/2" */
301 : 0x04, 0x05, 0x02, '2', '/', '3', '9', /* Port component: "2/10" */
302 : 0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
303 : 0x00, 0x00 /* End Of LLDPDU */
304 : };
305 : static const char* expected[] = {
306 : /* ordered pairs of Chassis+Port */
307 : "1/2", "2/10",
308 : "1/2", "2/3",
309 : "1/2", "2/39",
310 : "2/1", "1/3",
311 : "2/10", "1/0",
312 : "2/19", "1/0",
313 : };
314 :
315 : sd_lldp *lldp;
316 : sd_lldp_neighbor **neighbors;
317 : int i;
318 : uint8_t type;
319 : const void *data;
320 : size_t length, expected_length;
321 : uint16_t ttl;
322 :
323 1 : lldp_handler_calls = 0;
324 1 : assert_se(start_lldp(&lldp, e, lldp_handler, NULL) == 0);
325 :
326 1 : assert_se(write(test_fd[1], frame1, sizeof(frame1)) == sizeof(frame1));
327 1 : sd_event_run(e, 0);
328 1 : assert_se(write(test_fd[1], frame2, sizeof(frame2)) == sizeof(frame2));
329 1 : sd_event_run(e, 0);
330 1 : assert_se(write(test_fd[1], frame3, sizeof(frame3)) == sizeof(frame3));
331 1 : sd_event_run(e, 0);
332 1 : assert_se(write(test_fd[1], frame4, sizeof(frame4)) == sizeof(frame4));
333 1 : sd_event_run(e, 0);
334 1 : assert_se(write(test_fd[1], frame5, sizeof(frame5)) == sizeof(frame5));
335 1 : sd_event_run(e, 0);
336 1 : assert_se(write(test_fd[1], frame6, sizeof(frame6)) == sizeof(frame6));
337 1 : sd_event_run(e, 0);
338 1 : assert_se(lldp_handler_calls == 6);
339 :
340 1 : assert_se(sd_lldp_get_neighbors(lldp, &neighbors) == 6);
341 :
342 7 : for (i = 0; i < 6; i++) {
343 6 : assert_se(sd_lldp_neighbor_get_chassis_id(neighbors[i], &type, &data, &length) == 0);
344 6 : assert_se(type == SD_LLDP_CHASSIS_SUBTYPE_CHASSIS_COMPONENT);
345 6 : expected_length = strlen(expected[2 * i]);
346 6 : assert_se(length == expected_length);
347 6 : assert_se(memcmp(data, expected[2 * i], expected_length) == 0);
348 :
349 6 : assert_se(sd_lldp_neighbor_get_port_id(neighbors[i], &type, &data, &length) == 0);
350 6 : assert_se(type == SD_LLDP_PORT_SUBTYPE_PORT_COMPONENT);
351 6 : expected_length = strlen(expected[2 * i + 1]);
352 6 : assert_se(length == expected_length);
353 6 : assert_se(memcmp(data, expected[2 * i + 1], expected_length) == 0);
354 :
355 6 : assert_se(sd_lldp_neighbor_get_ttl(neighbors[i], &ttl) == 0);
356 6 : assert_se(ttl == 120);
357 : }
358 :
359 7 : for (i = 0; i < 6; i++)
360 6 : sd_lldp_neighbor_unref(neighbors[i]);
361 1 : free(neighbors);
362 :
363 1 : assert_se(stop_lldp(lldp) == 0);
364 1 : }
365 :
366 1 : int main(int argc, char *argv[]) {
367 2 : _cleanup_(sd_event_unrefp) sd_event *e = NULL;
368 :
369 1 : test_setup_logging(LOG_DEBUG);
370 :
371 : /* LLDP reception tests */
372 1 : assert_se(sd_event_new(&e) == 0);
373 1 : test_receive_basic_packet(e);
374 1 : test_receive_incomplete_packet(e);
375 1 : test_receive_oui_packet(e);
376 1 : test_multiple_neighbors_sorted(e);
377 :
378 1 : return 0;
379 : }
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