74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <test_progs.h>
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void test_probe_user(void)
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{
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const char *prog_name = "kprobe/__sys_connect";
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const char *obj_file = "./test_probe_user.o";
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DECLARE_LIBBPF_OPTS(bpf_object_open_opts, opts, );
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int err, results_map_fd, sock_fd, duration = 0;
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struct sockaddr curr, orig, tmp;
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struct sockaddr_in *in = (struct sockaddr_in *)&curr;
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struct bpf_link *kprobe_link = NULL;
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struct bpf_program *kprobe_prog;
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struct bpf_object *obj;
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static const int zero = 0;
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obj = bpf_object__open_file(obj_file, &opts);
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if (!ASSERT_OK_PTR(obj, "obj_open_file"))
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return;
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kprobe_prog = bpf_object__find_program_by_title(obj, prog_name);
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if (CHECK(!kprobe_prog, "find_probe",
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"prog '%s' not found\n", prog_name))
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goto cleanup;
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err = bpf_object__load(obj);
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if (CHECK(err, "obj_load", "err %d\n", err))
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goto cleanup;
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results_map_fd = bpf_find_map(__func__, obj, "test_pro.bss");
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if (CHECK(results_map_fd < 0, "find_bss_map",
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"err %d\n", results_map_fd))
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goto cleanup;
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kprobe_link = bpf_program__attach(kprobe_prog);
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if (!ASSERT_OK_PTR(kprobe_link, "attach_kprobe"))
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goto cleanup;
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memset(&curr, 0, sizeof(curr));
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in->sin_family = AF_INET;
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in->sin_port = htons(5555);
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in->sin_addr.s_addr = inet_addr("255.255.255.255");
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memcpy(&orig, &curr, sizeof(curr));
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sock_fd = socket(AF_INET, SOCK_STREAM, 0);
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if (CHECK(sock_fd < 0, "create_sock_fd", "err %d\n", sock_fd))
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goto cleanup;
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connect(sock_fd, &curr, sizeof(curr));
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close(sock_fd);
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err = bpf_map_lookup_elem(results_map_fd, &zero, &tmp);
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if (CHECK(err, "get_kprobe_res",
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"failed to get kprobe res: %d\n", err))
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goto cleanup;
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in = (struct sockaddr_in *)&tmp;
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if (CHECK(memcmp(&tmp, &orig, sizeof(orig)), "check_kprobe_res",
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"wrong kprobe res from probe read: %s:%u\n",
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inet_ntoa(in->sin_addr), ntohs(in->sin_port)))
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goto cleanup;
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memset(&tmp, 0xab, sizeof(tmp));
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in = (struct sockaddr_in *)&curr;
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if (CHECK(memcmp(&curr, &tmp, sizeof(tmp)), "check_kprobe_res",
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"wrong kprobe res from probe write: %s:%u\n",
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inet_ntoa(in->sin_addr), ntohs(in->sin_port)))
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goto cleanup;
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cleanup:
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bpf_link__destroy(kprobe_link);
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bpf_object__close(obj);
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}
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