summaryrefslogtreecommitdiffstats
path: root/tools/testing/selftests/bpf/test_sock_fields.c
blob: dcae7f664dce0827f5ddda4bc5f693d191def9b0 (plain)
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
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2019 Facebook */

#include <sys/socket.h>
#include <sys/epoll.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>

#include <bpf/bpf.h>
#include <bpf/libbpf.h>

#include "cgroup_helpers.h"
#include "bpf_rlimit.h"

enum bpf_addr_array_idx {
	ADDR_SRV_IDX,
	ADDR_CLI_IDX,
	__NR_BPF_ADDR_ARRAY_IDX,
};

enum bpf_result_array_idx {
	EGRESS_SRV_IDX,
	EGRESS_CLI_IDX,
	INGRESS_LISTEN_IDX,
	__NR_BPF_RESULT_ARRAY_IDX,
};

enum bpf_linum_array_idx {
	EGRESS_LINUM_IDX,
	INGRESS_LINUM_IDX,
	__NR_BPF_LINUM_ARRAY_IDX,
};

#define CHECK(condition, tag, format...) ({				\
	int __ret = !!(condition);					\
	if (__ret) {							\
		printf("%s(%d):FAIL:%s ", __func__, __LINE__, tag);	\
		printf(format);						\
		printf("\n");						\
		exit(-1);						\
	}								\
})

#define TEST_CGROUP "/test-bpf-sock-fields"
#define DATA "Hello BPF!"
#define DATA_LEN sizeof(DATA)

static struct sockaddr_in6 srv_sa6, cli_sa6;
static int linum_map_fd;
static int addr_map_fd;
static int tp_map_fd;
static int sk_map_fd;

static __u32 addr_srv_idx = ADDR_SRV_IDX;
static __u32 addr_cli_idx = ADDR_CLI_IDX;

static __u32 egress_srv_idx = EGRESS_SRV_IDX;
static __u32 egress_cli_idx = EGRESS_CLI_IDX;
static __u32 ingress_listen_idx = INGRESS_LISTEN_IDX;

static __u32 egress_linum_idx = EGRESS_LINUM_IDX;
static __u32 ingress_linum_idx = INGRESS_LINUM_IDX;

static void init_loopback6(struct sockaddr_in6 *sa6)
{
	memset(sa6, 0, sizeof(*sa6));
	sa6->sin6_family = AF_INET6;
	sa6->sin6_addr = in6addr_loopback;
}

static void print_sk(const struct bpf_sock *sk)
{
	char src_ip4[24], dst_ip4[24];
	char src_ip6[64], dst_ip6[64];

	inet_ntop(AF_INET, &sk->src_ip4, src_ip4, sizeof(src_ip4));
	inet_ntop(AF_INET6, &sk->src_ip6, src_ip6, sizeof(src_ip6));
	inet_ntop(AF_INET, &sk->dst_ip4, dst_ip4, sizeof(dst_ip4));
	inet_ntop(AF_INET6, &sk->dst_ip6, dst_ip6, sizeof(dst_ip6));

	printf("state:%u bound_dev_if:%u family:%u type:%u protocol:%u mark:%u priority:%u "
	       "src_ip4:%x(%s) src_ip6:%x:%x:%x:%x(%s) src_port:%u "
	       "dst_ip4:%x(%s) dst_ip6:%x:%x:%x:%x(%s) dst_port:%u\n",
	       sk->state, sk->bound_dev_if, sk->family, sk->type, sk->protocol,
	       sk->mark, sk->priority,
	       sk->src_ip4, src_ip4,
	       sk->src_ip6[0], sk->src_ip6[1], sk->src_ip6[2], sk->src_ip6[3],
	       src_ip6, sk->src_port,
	       sk->dst_ip4, dst_ip4,
	       sk->dst_ip6[0], sk->dst_ip6[1], sk->dst_ip6[2], sk->dst_ip6[3],
	       dst_ip6, ntohs(sk->dst_port));
}

static void print_tp(const struct bpf_tcp_sock *tp)
{
	printf("snd_cwnd:%u srtt_us:%u rtt_min:%u snd_ssthresh:%u rcv_nxt:%u "
	       "snd_nxt:%u snd:una:%u mss_cache:%u ecn_flags:%u "
	       "rate_delivered:%u rate_interval_us:%u packets_out:%u "
	       "retrans_out:%u total_retrans:%u segs_in:%u data_segs_in:%u "
	       "segs_out:%u data_segs_out:%u lost_out:%u sacked_out:%u "
	       "bytes_received:%llu bytes_acked:%llu\n",
	       tp->snd_cwnd, tp->srtt_us, tp->rtt_min, tp->snd_ssthresh,
	       tp->rcv_nxt, tp->snd_nxt, tp->snd_una, tp->mss_cache,
	       tp->ecn_flags, tp->rate_delivered, tp->rate_interval_us,
	       tp->packets_out, tp->retrans_out, tp->total_retrans,
	       tp->segs_in, tp->data_segs_in, tp->segs_out,
	       tp->data_segs_out, tp->lost_out, tp->sacked_out,
	       tp->bytes_received, tp->bytes_acked);
}

static void check_result(void)
{
	struct bpf_tcp_sock srv_tp, cli_tp, listen_tp;
	struct bpf_sock srv_sk, cli_sk, listen_sk;
	__u32 ingress_linum, egress_linum;
	int err;

	err = bpf_map_lookup_elem(linum_map_fd, &egress_linum_idx,
				  &egress_linum);
	CHECK(err == -1, "bpf_map_lookup_elem(linum_map_fd)",
	      "err:%d errno:%d", err, errno);

	err = bpf_map_lookup_elem(linum_map_fd, &ingress_linum_idx,
				  &ingress_linum);
	CHECK(err == -1, "bpf_map_lookup_elem(linum_map_fd)",
	      "err:%d errno:%d", err, errno);

	err = bpf_map_lookup_elem(sk_map_fd, &egress_srv_idx, &srv_sk);
	CHECK(err == -1, "bpf_map_lookup_elem(sk_map_fd, &egress_srv_idx)",
	      "err:%d errno:%d", err, errno);
	err = bpf_map_lookup_elem(tp_map_fd, &egress_srv_idx, &srv_tp);
	CHECK(err == -1, "bpf_map_lookup_elem(tp_map_fd, &egress_srv_idx)",
	      "err:%d errno:%d", err, errno);

	err = bpf_map_lookup_elem(sk_map_fd, &egress_cli_idx, &cli_sk);
	CHECK(err == -1, "bpf_map_lookup_elem(sk_map_fd, &egress_cli_idx)",
	      "err:%d errno:%d", err, errno);
	err = bpf_map_lookup_elem(tp_map_fd, &egress_cli_idx, &cli_tp);
	CHECK(err == -1, "bpf_map_lookup_elem(tp_map_fd, &egress_cli_idx)",
	      "err:%d errno:%d", err, errno);

	err = bpf_map_lookup_elem(sk_map_fd, &ingress_listen_idx, &listen_sk);
	CHECK(err == -1, "bpf_map_lookup_elem(sk_map_fd, &ingress_listen_idx)",
	      "err:%d errno:%d", err, errno);
	err = bpf_map_lookup_elem(tp_map_fd, &ingress_listen_idx, &listen_tp);
	CHECK(err == -1, "bpf_map_lookup_elem(tp_map_fd, &ingress_listen_idx)",
	      "err:%d errno:%d", err, errno);

	printf("listen_sk: ");
	print_sk(&listen_sk);
	printf("\n");

	printf("srv_sk: ");
	print_sk(&srv_sk);
	printf("\n");

	printf("cli_sk: ");
	print_sk(&cli_sk);
	printf("\n");

	printf("listen_tp: ");
	print_tp(&listen_tp);
	printf("\n");

	printf("srv_tp: ");
	print_tp(&srv_tp);
	printf("\n");

	printf("cli_tp: ");
	print_tp(&cli_tp);
	printf("\n");

	CHECK(listen_sk.state != 10 ||
	      listen_sk.family != AF_INET6 ||
	      listen_sk.protocol != IPPROTO_TCP ||
	      memcmp(listen_sk.src_ip6, &in6addr_loopback,
		     sizeof(listen_sk.src_ip6)) ||
	      listen_sk.dst_ip6[0] || listen_sk.dst_ip6[1] ||
	      listen_sk.dst_ip6[2] || listen_sk.dst_ip6[3] ||
	      listen_sk.src_port != ntohs(srv_sa6.sin6_port) ||
	      listen_sk.dst_port,
	      "Unexpected listen_sk",
	      "Check listen_sk output. ingress_linum:%u",
	      ingress_linum);

	CHECK(srv_sk.state == 10 ||
	      !srv_sk.state ||
	      srv_sk.family != AF_INET6 ||
	      srv_sk.protocol != IPPROTO_TCP ||
	      memcmp(srv_sk.src_ip6, &in6addr_loopback,
		     sizeof(srv_sk.src_ip6)) ||
	      memcmp(srv_sk.dst_ip6, &in6addr_loopback,
		     sizeof(srv_sk.dst_ip6)) ||
	      srv_sk.src_port != ntohs(srv_sa6.sin6_port) ||
	      srv_sk.dst_port != cli_sa6.sin6_port,
	      "Unexpected srv_sk", "Check srv_sk output. egress_linum:%u",
	      egress_linum);

	CHECK(cli_sk.state == 10 ||
	      !cli_sk.state ||
	      cli_sk.family != AF_INET6 ||
	      cli_sk.protocol != IPPROTO_TCP ||
	      memcmp(cli_sk.src_ip6, &in6addr_loopback,
		     sizeof(cli_sk.src_ip6)) ||
	      memcmp(cli_sk.dst_ip6, &in6addr_loopback,
		     sizeof(cli_sk.dst_ip6)) ||
	      cli_sk.src_port != ntohs(cli_sa6.sin6_port) ||
	      cli_sk.dst_port != srv_sa6.sin6_port,
	      "Unexpected cli_sk", "Check cli_sk output. egress_linum:%u",
	      egress_linum);

	CHECK(listen_tp.data_segs_out ||
	      listen_tp.data_segs_in ||
	      listen_tp.total_retrans ||
	      listen_tp.bytes_acked,
	      "Unexpected listen_tp", "Check listen_tp output. ingress_linum:%u",
	      ingress_linum);

	CHECK(srv_tp.data_segs_out != 1 ||
	      srv_tp.data_segs_in ||
	      srv_tp.snd_cwnd != 10 ||
	      srv_tp.total_retrans ||
	      srv_tp.bytes_acked != DATA_LEN,
	      "Unexpected srv_tp", "Check srv_tp output. egress_linum:%u",
	      egress_linum);

	CHECK(cli_tp.data_segs_out ||
	      cli_tp.data_segs_in != 1 ||
	      cli_tp.snd_cwnd != 10 ||
	      cli_tp.total_retrans ||
	      cli_tp.bytes_received != DATA_LEN,
	      "Unexpected cli_tp", "Check cli_tp output. egress_linum:%u",
	      egress_linum);
}

static void test(void)
{
	int listen_fd, cli_fd, accept_fd, epfd, err;
	struct epoll_event ev;
	socklen_t addrlen;

	addrlen = sizeof(struct sockaddr_in6);
	ev.events = EPOLLIN;

	epfd = epoll_create(1);
	CHECK(epfd == -1, "epoll_create()", "epfd:%d errno:%d", epfd, errno);

	/* Prepare listen_fd */
	listen_fd = socket(AF_INET6, SOCK_STREAM | SOCK_NONBLOCK, 0);
	CHECK(listen_fd == -1, "socket()", "listen_fd:%d errno:%d",
	      listen_fd, errno);

	init_loopback6(&srv_sa6);
	err = bind(listen_fd, (struct sockaddr *)&srv_sa6, sizeof(srv_sa6));
	CHECK(err, "bind(listen_fd)", "err:%d errno:%d", err, errno);

	err = getsockname(listen_fd, (struct sockaddr *)&srv_sa6, &addrlen);
	CHECK(err, "getsockname(listen_fd)", "err:%d errno:%d", err, errno);

	err = listen(listen_fd, 1);
	CHECK(err, "listen(listen_fd)", "err:%d errno:%d", err, errno);

	/* Prepare cli_fd */
	cli_fd = socket(AF_INET6, SOCK_STREAM | SOCK_NONBLOCK, 0);
	CHECK(cli_fd == -1, "socket()", "cli_fd:%d errno:%d", cli_fd, errno);

	init_loopback6(&cli_sa6);
	err = bind(cli_fd, (struct sockaddr *)&cli_sa6, sizeof(cli_sa6));
	CHECK(err, "bind(cli_fd)", "err:%d errno:%d", err, errno);

	err = getsockname(cli_fd, (struct sockaddr *)&cli_sa6, &addrlen);
	CHECK(err, "getsockname(cli_fd)", "err:%d errno:%d",
	      err, errno);

	/* Update addr_map with srv_sa6 and cli_sa6 */
	err = bpf_map_update_elem(addr_map_fd, &addr_srv_idx, &srv_sa6, 0);
	CHECK(err, "map_update", "err:%d errno:%d", err, errno);

	err = bpf_map_update_elem(addr_map_fd, &addr_cli_idx, &cli_sa6, 0);
	CHECK(err, "map_update", "err:%d errno:%d", err, errno);

	/* Connect from cli_sa6 to srv_sa6 */
	err = connect(cli_fd, (struct sockaddr *)&srv_sa6, addrlen);
	printf("srv_sa6.sin6_port:%u cli_sa6.sin6_port:%u\n\n",
	       ntohs(srv_sa6.sin6_port), ntohs(cli_sa6.sin6_port));
	CHECK(err && errno != EINPROGRESS,
	      "connect(cli_fd)", "err:%d errno:%d", err, errno);

	ev.data.fd = listen_fd;
	err = epoll_ctl(epfd, EPOLL_CTL_ADD, listen_fd, &ev);
	CHECK(err, "epoll_ctl(EPOLL_CTL_ADD, listen_fd)", "err:%d errno:%d",
	      err, errno);

	/* Accept the connection */
	/* Have some timeout in accept(listen_fd). Just in case. */
	err = epoll_wait(epfd, &ev, 1, 1000);
	CHECK(err != 1 || ev.data.fd != listen_fd,
	      "epoll_wait(listen_fd)",
	      "err:%d errno:%d ev.data.fd:%d listen_fd:%d",
	      err, errno, ev.data.fd, listen_fd);

	accept_fd = accept(listen_fd, NULL, NULL);
	CHECK(accept_fd == -1, "accept(listen_fd)", "accept_fd:%d errno:%d",
	      accept_fd, errno);
	close(listen_fd);

	/* Send some data from accept_fd to cli_fd */
	err = send(accept_fd, DATA, DATA_LEN, 0);
	CHECK(err != DATA_LEN, "send(accept_fd)", "err:%d errno:%d",
	      err, errno);

	/* Have some timeout in recv(cli_fd). Just in case. */
	ev.data.fd = cli_fd;
	err = epoll_ctl(epfd, EPOLL_CTL_ADD, cli_fd, &ev);
	CHECK(err, "epoll_ctl(EPOLL_CTL_ADD, cli_fd)", "err:%d errno:%d",
	      err, errno);

	err = epoll_wait(epfd, &ev, 1, 1000);
	CHECK(err != 1 || ev.data.fd != cli_fd,
	      "epoll_wait(cli_fd)", "err:%d errno:%d ev.data.fd:%d cli_fd:%d",
	      err, errno, ev.data.fd, cli_fd);

	err = recv(cli_fd, NULL, 0, MSG_TRUNC);
	CHECK(err, "recv(cli_fd)", "err:%d errno:%d", err, errno);

	close(epfd);
	close(accept_fd);
	close(cli_fd);

	check_result();
}

int main(int argc, char **argv)
{
	struct bpf_prog_load_attr attr = {
		.file = "test_sock_fields_kern.o",
		.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
	};
	int cgroup_fd, egress_fd, ingress_fd, err;
	struct bpf_program *ingress_prog;
	struct bpf_object *obj;
	struct bpf_map *map;

	err = setup_cgroup_environment();
	CHECK(err, "setup_cgroup_environment()", "err:%d errno:%d",
	      err, errno);

	atexit(cleanup_cgroup_environment);

	/* Create a cgroup, get fd, and join it */
	cgroup_fd = create_and_get_cgroup(TEST_CGROUP);
	CHECK(cgroup_fd == -1, "create_and_get_cgroup()",
	      "cgroup_fd:%d errno:%d", cgroup_fd, errno);

	err = join_cgroup(TEST_CGROUP);
	CHECK(err, "join_cgroup", "err:%d errno:%d", err, errno);

	err = bpf_prog_load_xattr(&attr, &obj, &egress_fd);
	CHECK(err, "bpf_prog_load_xattr()", "err:%d", err);

	ingress_prog = bpf_object__find_program_by_title(obj,
							 "cgroup_skb/ingress");
	CHECK(!ingress_prog,
	      "bpf_object__find_program_by_title(cgroup_skb/ingress)",
	      "not found");
	ingress_fd = bpf_program__fd(ingress_prog);

	err = bpf_prog_attach(egress_fd, cgroup_fd, BPF_CGROUP_INET_EGRESS, 0);
	CHECK(err == -1, "bpf_prog_attach(CPF_CGROUP_INET_EGRESS)",
	      "err:%d errno%d", err, errno);

	err = bpf_prog_attach(ingress_fd, cgroup_fd,
			      BPF_CGROUP_INET_INGRESS, 0);
	CHECK(err == -1, "bpf_prog_attach(CPF_CGROUP_INET_INGRESS)",
	      "err:%d errno%d", err, errno);
	close(cgroup_fd);

	map = bpf_object__find_map_by_name(obj, "addr_map");
	CHECK(!map, "cannot find addr_map", "(null)");
	addr_map_fd = bpf_map__fd(map);

	map = bpf_object__find_map_by_name(obj, "sock_result_map");
	CHECK(!map, "cannot find sock_result_map", "(null)");
	sk_map_fd = bpf_map__fd(map);

	map = bpf_object__find_map_by_name(obj, "tcp_sock_result_map");
	CHECK(!map, "cannot find tcp_sock_result_map", "(null)");
	tp_map_fd = bpf_map__fd(map);

	map = bpf_object__find_map_by_name(obj, "linum_map");
	CHECK(!map, "cannot find linum_map", "(null)");
	linum_map_fd = bpf_map__fd(map);

	test();

	bpf_object__close(obj);
	cleanup_cgroup_environment();

	printf("PASS\n");

	return 0;
}