1// SPDX-License-Identifier: GPL-2.0
 2#include <test_progs.h>
 3
 4void test_probe_user(void)
 5{
 6	const char *prog_name = "kprobe/__sys_connect";
 7	const char *obj_file = "./test_probe_user.o";
 8	DECLARE_LIBBPF_OPTS(bpf_object_open_opts, opts, );
 9	int err, results_map_fd, sock_fd, duration = 0;
10	struct sockaddr curr, orig, tmp;
11	struct sockaddr_in *in = (struct sockaddr_in *)&curr;
12	struct bpf_link *kprobe_link = NULL;
13	struct bpf_program *kprobe_prog;
14	struct bpf_object *obj;
15	static const int zero = 0;
16
17	obj = bpf_object__open_file(obj_file, &opts);
18	if (CHECK(IS_ERR(obj), "obj_open_file", "err %ld\n", PTR_ERR(obj)))
19		return;
20
21	kprobe_prog = bpf_object__find_program_by_title(obj, prog_name);
22	if (CHECK(!kprobe_prog, "find_probe",
23		  "prog '%s' not found\n", prog_name))
24		goto cleanup;
25
26	err = bpf_object__load(obj);
27	if (CHECK(err, "obj_load", "err %d\n", err))
28		goto cleanup;
29
30	results_map_fd = bpf_find_map(__func__, obj, "test_pro.bss");
31	if (CHECK(results_map_fd < 0, "find_bss_map",
32		  "err %d\n", results_map_fd))
33		goto cleanup;
34
35	kprobe_link = bpf_program__attach(kprobe_prog);
36	if (CHECK(IS_ERR(kprobe_link), "attach_kprobe",
37		  "err %ld\n", PTR_ERR(kprobe_link))) {
38		kprobe_link = NULL;
39		goto cleanup;
40	}
41
42	memset(&curr, 0, sizeof(curr));
43	in->sin_family = AF_INET;
44	in->sin_port = htons(5555);
45	in->sin_addr.s_addr = inet_addr("255.255.255.255");
46	memcpy(&orig, &curr, sizeof(curr));
47
48	sock_fd = socket(AF_INET, SOCK_STREAM, 0);
49	if (CHECK(sock_fd < 0, "create_sock_fd", "err %d\n", sock_fd))
50		goto cleanup;
51
52	connect(sock_fd, &curr, sizeof(curr));
53	close(sock_fd);
54
55	err = bpf_map_lookup_elem(results_map_fd, &zero, &tmp);
56	if (CHECK(err, "get_kprobe_res",
57		  "failed to get kprobe res: %d\n", err))
58		goto cleanup;
59
60	in = (struct sockaddr_in *)&tmp;
61	if (CHECK(memcmp(&tmp, &orig, sizeof(orig)), "check_kprobe_res",
62		  "wrong kprobe res from probe read: %s:%u\n",
63		  inet_ntoa(in->sin_addr), ntohs(in->sin_port)))
64		goto cleanup;
65
66	memset(&tmp, 0xab, sizeof(tmp));
67
68	in = (struct sockaddr_in *)&curr;
69	if (CHECK(memcmp(&curr, &tmp, sizeof(tmp)), "check_kprobe_res",
70		  "wrong kprobe res from probe write: %s:%u\n",
71		  inet_ntoa(in->sin_addr), ntohs(in->sin_port)))
72		goto cleanup;
73cleanup:
74	bpf_link__destroy(kprobe_link);
75	bpf_object__close(obj);
76}