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