| // SPDX-License-Identifier: GPL-2.0 |
| #include <test_progs.h> |
| |
| void test_probe_user(void) |
| { |
| const char *prog_name = "kprobe/__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 (CHECK(IS_ERR(obj), "obj_open_file", "err %ld\n", PTR_ERR(obj))) |
| return; |
| |
| kprobe_prog = bpf_object__find_program_by_title(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 (CHECK(IS_ERR(kprobe_link), "attach_kprobe", |
| "err %ld\n", PTR_ERR(kprobe_link))) { |
| kprobe_link = NULL; |
| 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); |
| } |